12 files changed, 312 insertions, 50 deletions
diff --git a/phpBB/download/file.php b/phpBB/download/file.php
index 891352f00c..68a4afe03c 100644
--- a/phpBB/download/file.php
+++ b/phpBB/download/file.php
@@ -246,7 +246,7 @@ if (!download_allowed())
 $download_mode = (int) $extensions[$attachment['extension']]['download_mode'];
 
 // Fetching filename here to prevent sniffing of filename
-$sql = 'SELECT attach_id, is_orphan, in_message, post_msg_id, extension, physical_filename, real_filename, mimetype, filetime
+$sql = 'SELECT attach_id, is_orphan, in_message, post_msg_id, extension, physical_filename, real_filename, mimetype, filesize, filetime
 	FROM ' . ATTACHMENTS_TABLE . "
 	WHERE attach_id = $download_id";
 $result = $db->sql_query_limit($sql, 1);
@@ -275,7 +275,7 @@ if ($thumbnail)
 {
 	$attachment['physical_filename'] = 'thumb_' . $attachment['physical_filename'];
 }
-else if (($display_cat == ATTACHMENT_CATEGORY_NONE/* || $display_cat == ATTACHMENT_CATEGORY_IMAGE*/) && !$attachment['is_orphan'])
+else if (($display_cat == ATTACHMENT_CATEGORY_NONE/* || $display_cat == ATTACHMENT_CATEGORY_IMAGE*/) && !$attachment['is_orphan'] && !phpbb_http_byte_range($attachment['filesize']))
 {
 	// Update download count
 	$sql = 'UPDATE ' . ATTACHMENTS_TABLE . '
diff --git a/phpBB/includes/acp/acp_database.php b/phpBB/includes/acp/acp_database.php
index 0582d6204e..193dd001c0 100644
--- a/phpBB/includes/acp/acp_database.php
+++ b/phpBB/includes/acp/acp_database.php
@@ -1619,41 +1619,48 @@ class mssql_extractor extends base_extractor
 	function write_data_mssqlnative($table_name)
 	{
 		global $db;
-		$ary_type = $ary_name = $meta_array = array();
+		$ary_type = $ary_name = array();
 		$ident_set = false;
 		$sql_data = '';
 
 		// Grab all of the data from current table.
 		$sql = "SELECT * FROM $table_name";
+		$db->mssqlnative_set_query_options(array('Scrollable' => SQLSRV_CURSOR_STATIC));
 		$result = $db->sql_query($sql);
 
-		$retrieved_data = $db->mssqlnative_num_rows($result); 
+		$retrieved_data = $db->mssqlnative_num_rows($result);
 
-		$meta_array = sqlsrv_field_metadata($result);	
-		$i_num_fields = sqlsrv_num_fields($result);
-	
+		if (!$retrieved_data)
+		{
+			$db->sql_freeresult($result);
+			return;
+		}
+
+		$sql = "SELECT * FROM $table_name";
+		$result_fields = $db->sql_query_limit($sql, 1);
+
+		$row = new result_mssqlnative($result_fields);
+		$i_num_fields = $row->num_fields();
+		
 		for ($i = 0; $i < $i_num_fields; $i++)
 		{
-			$info = $db->mssqlnative_fieldInfo($table_name, $meta_array[$i]['Name']);
-			$ary_type[$i] = $info->type();
-			$ary_name[$i] = $info->name();
+			$ary_type[$i] = $row->field_type($i);
+			$ary_name[$i] = $row->field_name($i);
 		}
+		$db->sql_freeresult($result_fields);
+
+		$sql = "SELECT 1 as has_identity
+			FROM INFORMATION_SCHEMA.COLUMNS
+			WHERE COLUMNPROPERTY(object_id('$table_name'), COLUMN_NAME, 'IsIdentity') = 1";
+		$result2 = $db->sql_query($sql);
+		$row2 = $db->sql_fetchrow($result2);
 		
-		if ($retrieved_data)
+		if (!empty($row2['has_identity']))
 		{
-			$sql = "SELECT 1 as has_identity
-				FROM INFORMATION_SCHEMA.COLUMNS
-				WHERE COLUMNPROPERTY(object_id('$table_name'), COLUMN_NAME, 'IsIdentity') = 1";
-			$result2 = $db->sql_query($sql);
-			$row2 = $db->sql_fetchrow($result2);
-			
-			if (!empty($row2['has_identity']))
-			{
-				$sql_data .= "\nSET IDENTITY_INSERT $table_name ON\nGO\n";
-				$ident_set = true;
-			}
-			$db->sql_freeresult($result2);
+			$sql_data .= "\nSET IDENTITY_INSERT $table_name ON\nGO\n";
+			$ident_set = true;
 		}
+		$db->sql_freeresult($result2);
 
 		while ($row = $db->sql_fetchrow($result))
 		{
@@ -1664,7 +1671,8 @@ class mssql_extractor extends base_extractor
 			{
 				$str_val = $row[$ary_name[$i]];
 
-				if (preg_match('#char|text|bool|varbinary#i', $ary_type[$i]))
+				// defaults to type number - better quote just to be safe, so check for is_int too
+				if (is_int($ary_type[$i]) || preg_match('#char|text|bool|varbinary#i', $ary_type[$i]))
 				{
 					$str_quote = '';
 					$str_empty = "''";
@@ -1705,7 +1713,7 @@ class mssql_extractor extends base_extractor
 		}
 		$db->sql_freeresult($result);
 
-		if ($retrieved_data && $ident_set)
+		if ($ident_set)
 		{
 			$sql_data .= "\nSET IDENTITY_INSERT $table_name OFF\nGO\n";
 		}
diff --git a/phpBB/includes/acp/acp_groups.php b/phpBB/includes/acp/acp_groups.php
index 60512c67b8..486616c33d 100644
--- a/phpBB/includes/acp/acp_groups.php
+++ b/phpBB/includes/acp/acp_groups.php
@@ -394,6 +394,15 @@ class acp_groups
 						}
 					}
 
+					// Validate the length of "Maximum number of allowed recipients per private message" setting.
+					// We use 16777215 as a maximum because it matches MySQL unsigned mediumint maximum value
+					// which is the lowest amongst DBMSes supported by phpBB3
+					if ($max_recipients_error = validate_data($submit_ary, array('max_recipients' => array('num', false, 0, 16777215))))
+					{
+						// Replace "error" string with its real, localised form
+						$error = array_merge($error, array_map(array(&$user, 'lang'), $max_recipients_error));
+					}
+
 					if (!sizeof($error))
 					{
 						// Only set the rank, colour, etc. if it's changed or if we're adding a new
diff --git a/phpBB/includes/db/mssqlnative.php b/phpBB/includes/db/mssqlnative.php
index 44d5722e4f..d6ac3b3acc 100644
--- a/phpBB/includes/db/mssqlnative.php
+++ b/phpBB/includes/db/mssqlnative.php
@@ -51,7 +51,6 @@ class result_mssqlnative
 		}
 
 		$this->m_row_count = count($this->m_rows);
-		sqlsrv_free_stmt($queryresult);
 	}
 
 	private function array_to_obj($array, &$obj)
@@ -199,6 +198,7 @@ class dbal_mssqlnative extends dbal
 {
 	var $m_insert_id = NULL;
 	var $last_query_text = '';
+	var $query_options = array();
 
 	/**
 	* Connect to server
@@ -308,10 +308,12 @@ class dbal_mssqlnative extends dbal
 
 			if ($this->query_result === false)
 			{
-				if (($this->query_result = @sqlsrv_query($this->db_connect_id, $query)) === false)
+				if (($this->query_result = @sqlsrv_query($this->db_connect_id, $query, array(), $this->query_options)) === false)
 				{
 					$this->sql_error($query);
 				}
+				// reset options for next query
+				$this->query_options = array();
 
 				if (defined('DEBUG_EXTRA'))
 				{
@@ -598,20 +600,28 @@ class dbal_mssqlnative extends dbal
 	* Utility method used to retrieve number of rows
 	* Emulates mysql_num_rows
 	* Used in acp_database.php -> write_data_mssqlnative()
+	* Requires a static or keyset cursor to be definde via
+	* mssqlnative_set_query_options()
 	*/
 	function mssqlnative_num_rows($res)
 	{
 		if ($res !== false)
 		{
-			$row = new result_mssqlnative($res);
-			$num_rows = $row->num_rows();
-			return $num_rows;
+			return sqlsrv_num_rows($res);
 		}
 		else
 		{
 			return false;
 		}
 	}
+	
+	/**
+	* Allows setting mssqlnative specific query options passed to sqlsrv_query as 4th parameter.
+	*/
+	function mssqlnative_set_query_options($options)
+	{
+		$this->query_options = $options;
+	}
 }
 
 ?>
 \ No newline at end of file
diff --git a/phpBB/includes/functions_download.php b/phpBB/includes/functions_download.php
index 87bf7a91a6..94d851e383 100644
--- a/phpBB/includes/functions_download.php
+++ b/phpBB/includes/functions_download.php
@@ -157,6 +157,16 @@ function send_file_to_browser($attachment, $upload_dir, $category)
 		trigger_error('UNABLE_TO_DELIVER_FILE');
 	}
 
+	// Make sure the database record for the filesize is correct
+	if ($size > 0 && $size != $attachment['filesize'])
+	{
+		// Update database record
+		$sql = 'UPDATE ' . ATTACHMENTS_TABLE . '
+			SET filesize = ' . (int) $size . '
+			WHERE attach_id = ' . (int) $attachment['attach_id'];
+		$db->sql_query($sql);
+	}
+
 	// Now the tricky part... let's dance
 	header('Pragma: public');
 
@@ -226,6 +236,16 @@ function send_file_to_browser($attachment, $upload_dir, $category)
 
 		if ($fp !== false)
 		{
+			// Deliver file partially if requested
+			if ($range = phpbb_http_byte_range($size))
+			{
+				fseek($fp, $range['byte_pos_start']);
+
+				send_status_line(206, 'Partial Content');
+				header('Content-Range: bytes ' . $range['byte_pos_start'] . '-' . $range['byte_pos_end'] . '/' . $range['bytes_total']);
+				header('Content-Length: ' . $range['bytes_requested']);
+			}
+
 			while (!feof($fp))
 			{
 				echo fread($fp, 8192);
@@ -407,3 +427,151 @@ function file_gc()
 	$db->sql_close();
 	exit;
 }
+
+/**
+* HTTP range support (RFC 2616 Section 14.35)
+*
+* Allows browsers to request partial file content
+* in case a download has been interrupted.
+*
+* @param int $filesize		the size of the file in bytes we are about to deliver
+*
+* @return mixed		false if the whole file has to be delivered
+*					associative array on success
+*/
+function phpbb_http_byte_range($filesize)
+{
+	// Only call find_range_request() once.
+	static $request_array;
+
+	if (!$filesize)
+	{
+		return false;
+	}
+
+	if (!isset($request_array))
+	{
+		$request_array = phpbb_find_range_request();
+	}
+	
+	return (empty($request_array)) ? false : phpbb_parse_range_request($request_array, $filesize);
+}
+
+/**
+* Searches for HTTP range request in super globals.
+*
+* @return mixed		false if no request found
+*					array of strings containing the requested ranges otherwise
+*					e.g. array(0 => '0-0', 1 => '123-125')
+*/
+function phpbb_find_range_request()
+{
+	$globals = array(
+		array('_SERVER',	'HTTP_RANGE'),
+		array('_ENV',		'HTTP_RANGE'),
+	);
+
+	foreach ($globals as $array)
+	{
+		$global	= $array[0];
+		$key	= $array[1];
+
+		// Make sure range request starts with "bytes="
+		if (isset($GLOBALS[$global][$key]) && strpos($GLOBALS[$global][$key], 'bytes=') === 0)
+		{
+			// Strip leading 'bytes='
+			// Multiple ranges can be separated by a comma
+			return explode(',', substr($GLOBALS[$global][$key], 6));
+		}
+	}
+
+	return false;
+}
+
+/**
+* Analyses a range request array.
+*
+* A range request can contain multiple ranges,
+* we however only handle the first request and
+* only support requests from a given byte to the end of the file.
+*
+* @param array	$request_array	array of strings containing the requested ranges
+* @param int	$filesize		the full size of the file in bytes that has been requested
+*
+* @return mixed		false if the whole file has to be delivered
+*					associative array on success
+*						byte_pos_start		the first byte position, can be passed to fseek()
+*						byte_pos_end		the last byte position
+*						bytes_requested		the number of bytes requested
+*						bytes_total			the full size of the file
+*/
+function phpbb_parse_range_request($request_array, $filesize)
+{
+	// Go through all ranges
+	foreach ($request_array as $range_string)
+	{
+		$range = explode('-', trim($range_string));
+
+		// "-" is invalid, "0-0" however is valid and means the very first byte.
+		if (sizeof($range) != 2 || $range[0] === '' && $range[1] === '')
+		{
+			continue;
+		}
+
+		if ($range[0] === '')
+		{
+			// Return last $range[1] bytes.
+
+			if (!$range[1])
+			{
+				continue;
+			}
+
+			if ($range[1] >= $filesize)
+			{
+				return false;
+			}
+
+			$first_byte_pos	= $filesize - (int) $range[1];
+			$last_byte_pos	= $filesize - 1;
+		}
+		else
+		{
+			// Return bytes from $range[0] to $range[1]
+
+			$first_byte_pos	= (int) $range[0];
+			$last_byte_pos	= (int) $range[1];
+
+			if ($last_byte_pos && $last_byte_pos < $first_byte_pos)
+			{
+				// The requested range contains 0 bytes.
+				continue;
+			}
+
+			if ($first_byte_pos >= $filesize)
+			{
+				// Requested range not satisfiable
+				return false;
+			}
+
+			// Adjust last-byte-pos if it is absent or greater than the content.
+			if ($range[1] === '' || $last_byte_pos >= $filesize)
+			{
+				$last_byte_pos = $filesize - 1;
+			}
+		}
+
+		// We currently do not support range requests that end before the end of the file
+		if ($last_byte_pos != $filesize - 1)
+		{
+			continue;
+		}
+
+		return array(
+			'byte_pos_start'	=> $first_byte_pos,
+			'byte_pos_end'		=> $last_byte_pos,
+			'bytes_requested'	=> $last_byte_pos - $first_byte_pos + 1,
+			'bytes_total'		=> $filesize,
+		);
+	}
+}
diff --git a/phpBB/includes/functions_messenger.php b/phpBB/includes/functions_messenger.php
index bb0d88ec1b..b5c87094c0 100644
--- a/phpBB/includes/functions_messenger.php
+++ b/phpBB/includes/functions_messenger.php
@@ -632,6 +632,64 @@ class queue
 	}
 
 	/**
+	* Obtains exclusive lock on queue cache file.
+	* Returns resource representing the lock
+	*/
+	function lock()
+	{
+		// For systems that can't have two processes opening
+		// one file for writing simultaneously
+		if (file_exists($this->cache_file . '.lock'))
+		{
+			$mode = 'rb';
+		}
+		else
+		{
+			$mode = 'wb';
+		}
+
+		$lock_fp = @fopen($this->cache_file . '.lock', $mode);
+
+		if ($mode == 'wb')
+		{
+			if (!$lock_fp)
+			{
+				// Two processes may attempt to create lock file at the same time.
+				// Have the losing process try opening the lock file again for reading
+				// on the assumption that the winning process created it
+				$mode = 'rb';
+				$lock_fp = @fopen($this->cache_file . '.lock', $mode);
+			}
+			else
+			{
+				// Only need to set mode when the lock file is written
+				@chmod($this->cache_file . '.lock', 0666);
+			}
+		}
+
+		if ($lock_fp)
+		{
+			@flock($lock_fp, LOCK_EX);
+		}
+
+		return $lock_fp;
+	}
+
+	/**
+	* Releases lock on queue cache file, using resource obtained from lock()
+	*/
+	function unlock($lock_fp)
+	{
+		// lock() will return null if opening lock file, and thus locking, failed.
+		// Accept null values here so that client code does not need to check them
+		if ($lock_fp)
+		{
+			@flock($lock_fp, LOCK_UN);
+			fclose($lock_fp);
+		}
+	}
+
+	/**
 	* Process queue
 	* Using lock file
 	*/
@@ -639,24 +697,16 @@ class queue
 	{
 		global $db, $config, $phpEx, $phpbb_root_path, $user;
 
-		set_config('last_queue_run', time(), true);
+		$lock_fp = $this->lock();
 
-		// Delete stale lock file
-		if (file_exists($this->cache_file . '.lock') && !file_exists($this->cache_file))
-		{
-			@unlink($this->cache_file . '.lock');
-			return;
-		}
+		set_config('last_queue_run', time(), true);
 
-		if (!file_exists($this->cache_file) || (file_exists($this->cache_file . '.lock') && filemtime($this->cache_file) > time() - $config['queue_interval']))
+		if (!file_exists($this->cache_file) || filemtime($this->cache_file) > time() - $config['queue_interval'])
 		{
+			$this->unlock($lock_fp);
 			return;
 		}
 
-		$fp = @fopen($this->cache_file . '.lock', 'wb');
-		fclose($fp);
-		@chmod($this->cache_file . '.lock', 0777);
-
 		include($this->cache_file);
 
 		foreach ($this->queue_data as $object => $data_ary)
@@ -720,6 +770,7 @@ class queue
 				break;
 
 				default:
+					$this->unlock($lock_fp);
 					return;
 			}
 
@@ -745,8 +796,6 @@ class queue
 
 						if (!$result)
 						{
-							@unlink($this->cache_file . '.lock');
-
 							messenger::error('EMAIL', $err_msg);
 							continue 2;
 						}
@@ -790,16 +839,14 @@ class queue
 		{
 			if ($fp = @fopen($this->cache_file, 'wb'))
 			{
-				@flock($fp, LOCK_EX);
 				fwrite($fp, "<?php\nif (!defined('IN_PHPBB')) exit;\n\$this->queue_data = unserialize(" . var_export(serialize($this->queue_data), true) . ");\n\n?>");
-				@flock($fp, LOCK_UN);
 				fclose($fp);
 
 				phpbb_chmod($this->cache_file, CHMOD_READ | CHMOD_WRITE);
 			}
 		}
 
-		@unlink($this->cache_file . '.lock');
+		$this->unlock($lock_fp);
 	}
 
 	/**
@@ -812,6 +859,8 @@ class queue
 			return;
 		}
 
+		$lock_fp = $this->lock();
+
 		if (file_exists($this->cache_file))
 		{
 			include($this->cache_file);
@@ -831,13 +880,13 @@ class queue
 
 		if ($fp = @fopen($this->cache_file, 'w'))
 		{
-			@flock($fp, LOCK_EX);
 			fwrite($fp, "<?php\nif (!defined('IN_PHPBB')) exit;\n\$this->queue_data = unserialize(" . var_export(serialize($this->data), true) . ");\n\n?>");
-			@flock($fp, LOCK_UN);
 			fclose($fp);
 
 			phpbb_chmod($this->cache_file, CHMOD_READ | CHMOD_WRITE);
 		}
+
+		$this->unlock($lock_fp);
 	}
 }
 
diff --git a/phpBB/includes/search/fulltext_mysql.php b/phpBB/includes/search/fulltext_mysql.php
index 0be3a10e5f..29cdd8ee9a 100644
--- a/phpBB/includes/search/fulltext_mysql.php
+++ b/phpBB/includes/search/fulltext_mysql.php
@@ -919,6 +919,14 @@ class fulltext_mysql extends search_backend
 			<dt><label>' . $user->lang['FULLTEXT_MYSQL_MBSTRING'] . '</label><br /><span>' . $user->lang['FULLTEXT_MYSQL_MBSTRING_EXPLAIN'] . '</span></dt>
 			<dd>' . (($this->mbstring_regex) ? $user->lang['YES'] : $user->lang['NO']). '</dd>
 		</dl>
+		<dl>
+			<dt><label>' . $user->lang['MIN_SEARCH_CHARS'] . ':</label><br /><span>' . $user->lang['FULLTEXT_MYSQL_MIN_SEARCH_CHARS_EXPLAIN'] . '</span></dt>
+			<dd>' . $config['fulltext_mysql_min_word_len'] . '</dd>
+		</dl>
+		<dl>
+			<dt><label>' . $user->lang['MAX_SEARCH_CHARS'] . ':</label><br /><span>' . $user->lang['FULLTEXT_MYSQL_MAX_SEARCH_CHARS_EXPLAIN'] . '</span></dt>
+			<dd>' . $config['fulltext_mysql_max_word_len'] . '</dd>
+		</dl>
 		';
 
 		// These are fields required in the config table
diff --git a/phpBB/language/en/acp/search.php b/phpBB/language/en/acp/search.php
index 88eed9d948..a7d687d7c2 100644
--- a/phpBB/language/en/acp/search.php
+++ b/phpBB/language/en/acp/search.php
@@ -59,6 +59,8 @@ $lang = array_merge($lang, array(
 	'FULLTEXT_MYSQL_PCRE'					=> 'Support for non-latin UTF-8 characters using PCRE:',
 	'FULLTEXT_MYSQL_MBSTRING_EXPLAIN'		=> 'If PCRE does not have unicode character properties, the search backend will try to use mbstring’s regular expression engine.',
 	'FULLTEXT_MYSQL_PCRE_EXPLAIN'			=> 'This search backend requires PCRE unicode character properties, only available in PHP 4.4, 5.1 and above, if you want to search for non-latin characters.',
+	'FULLTEXT_MYSQL_MIN_SEARCH_CHARS_EXPLAIN'	=> 'Words with at least this many characters will be indexed for searching. You or your host can only change this setting by changing the mysql configuration.',
+	'FULLTEXT_MYSQL_MAX_SEARCH_CHARS_EXPLAIN'	=> 'Words with no more than this many characters will be indexed for searching. You or your host can only change this setting by changing the mysql configuration.',
 
 	'GENERAL_SEARCH_SETTINGS'				=> 'General search settings',
 	'GO_TO_SEARCH_INDEX'					=> 'Go to search index page',
diff --git a/phpBB/language/en/captcha_recaptcha.php b/phpBB/language/en/captcha_recaptcha.php
index 897e8a4979..463bfffe0d 100644
--- a/phpBB/language/en/captcha_recaptcha.php
+++ b/phpBB/language/en/captcha_recaptcha.php
@@ -46,7 +46,7 @@ $lang = array_merge($lang, array(
 	'RECAPTCHA_PRIVATE'				=> 'Private reCaptcha key',
 	'RECAPTCHA_PRIVATE_EXPLAIN'		=> 'Your private reCaptcha key. Keys can be obtained on <a href="http://recaptcha.net">reCaptcha.net</a>.',
 
-	'RECAPTCHA_EXPLAIN'				=> 'In an effort to prevent automatic submissions, we require that you enter both of the words displayed below into the text field underneath.',
+	'RECAPTCHA_EXPLAIN'				=> 'In an effort to prevent automatic submissions, we require that you enter both of the words displayed into the text field underneath.',
 ));
 
 ?>
 \ No newline at end of file
diff --git a/phpBB/language/en/common.php b/phpBB/language/en/common.php
index bc38c1563d..e79e5a6de3 100644
--- a/phpBB/language/en/common.php
+++ b/phpBB/language/en/common.php
@@ -566,6 +566,9 @@ $lang = array_merge($lang, array(
 	'TEST_CONNECTION'	=> 'Test connection',
 	'THE_TEAM'			=> 'The team',
 	'TIME'				=> 'Time',
+	
+	'TOO_LARGE'						=> 'The value you entered is too large.',
+	'TOO_LARGE_MAX_RECIPIENTS'		=> 'The value of <strong>Maximum number of allowed recipients per private message</strong> setting you entered is too large.',
 
 	'TOO_LONG'						=> 'The value you entered is too long.',
 
@@ -608,6 +611,9 @@ $lang = array_merge($lang, array(
 	'TOO_SHORT_EMAIL_CONFIRM'		=> 'The e-mail address confirmation you entered is too short.',
 	'TOO_SHORT_WEBSITE'				=> 'The website address you entered is too short.',
 	'TOO_SHORT_YIM'					=> 'The Yahoo! Messenger name you entered is too short.',
+	
+	'TOO_SMALL'						=> 'The value you entered is too small.',
+	'TOO_SMALL_MAX_RECIPIENTS'		=> 'The value of <strong>Maximum number of allowed recipients per private message</strong> setting you entered is too small.',
 
 	'TOPIC'				=> 'Topic',
 	'TOPICS'			=> 'Topics',
diff --git a/phpBB/styles/prosilver/template/captcha_recaptcha.html b/phpBB/styles/prosilver/template/captcha_recaptcha.html
index 97d2cda28e..51a1615bd5 100644
--- a/phpBB/styles/prosilver/template/captcha_recaptcha.html
+++ b/phpBB/styles/prosilver/template/captcha_recaptcha.html
@@ -16,6 +16,7 @@
 		// <![CDATA[
 		var RecaptchaOptions = {
 			lang : '{LA_RECAPTCHA_LANG}',
+			theme : 'clean',
 			tabindex : <!-- IF $CAPTCHA_TAB_INDEX -->{$CAPTCHA_TAB_INDEX}<!-- ELSE -->10<!-- ENDIF -->
 		};
 		// ]]>
diff --git a/phpBB/styles/subsilver2/template/captcha_recaptcha.html b/phpBB/styles/subsilver2/template/captcha_recaptcha.html
index 3776c77ea4..ec09b28ef5 100644
--- a/phpBB/styles/subsilver2/template/captcha_recaptcha.html
+++ b/phpBB/styles/subsilver2/template/captcha_recaptcha.html
@@ -9,6 +9,7 @@
 		// <![CDATA[
 		var RecaptchaOptions = {
 			lang : '{LA_RECAPTCHA_LANG}',
+			theme : 'clean',
 			tabindex : <!-- IF $CAPTCHA_TAB_INDEX -->{$CAPTCHA_TAB_INDEX}<!-- ELSE -->10<!-- ENDIF -->
 		};
 		// ]]>