I just submitted hplip version 3.9.2 to Mandriva 2009.1 Cooker. If everything goes fine, this package will probably be available in a couple of hours, depending on the mirror you use. This version should bring many bug fixes to the QT4 interface (which was still experimental in previous hplip versions) and adds support for some new HP printers.
In this package, I also merged lots of patches and changes from Fedora and Debian/Ubuntu. Most important, this includes some changes in the way permissions on the device are set. It would be good if as many people as possible could extensively test this.
Make sure that your computer system is completely up to date Cooker (run urpmi –auto-update as root before) and make sure you have these packages installed: hplip-3.9.2-1mdv2009.1, hplip-hpijs-3.9.2-1mdv2009.1, hplip-gui-3.9.2-1mdv2009.1, foomatic-db-hpijs-20090208-1mdv2009.1 and foomatic-db-engine-4.0-0.20090316.1mdv2009.1.
You can configure your printer by running the command hp-setup. What needs to be checked, is that the printer works in any case: when you boot your computer while the printer is plugged in, and also when you only plug in your printer after you have started your computer. The same thing for scanning, if you have a multi-functional HP printer with integrated scanner. It would also be interesting if people could test the fax functionality of hplip (in the applications menu Tools – System Tools – HP Sendfax).
If something is not working, run the hp-check -r command as root, and post the resulting hp-check file to a bug report on Mandriva’s bugzilla, including detailed information about your printer configuration and what exactly is not working. You can add my e-mail address email@example.com in CC.