2011/10/12 Florian Hubold <doktor5000@arcor.de>
Could you please try to remove all hplip and cups packages,
clear your /etc/cups/printers.conf and reinstall cups, and try a manual
install of hplip according to http://hplipopensource.com/hplip-web/install/manual/distros/other.html
This would rule if the problem could be in our packages.

I'll do this soon.

I have tested with another installation of up-to-date Mageia done on an external disk (another hard drive I used for work). It prints fine. So it may possibly not come from the Mageia packages, but would rather come from a quirk somewhere is the system, as another disk with Mageia does install the printer and print without any issue a test page.