Have you contacted Mandriva about this? Their website is http://wwwnew.mandriva.com/en/community/
Have you contacted CUPS about this? Their website is http://www.cups.org/
Obviously, something isn't working properly between the two.
Let me know what you find out.
For me, my printing is working fine. But I'm doing things differently. I bought ESP Print Pro (http://www.easysw.com/printpro/
) and it works "out of the box". At the same time, I also like to know how things work. So I've been spending some time here, looking at the problems people are having and trying to learn from them.
Your printer is fully supported here too. You wont have to worry about some of the features of the printer not working.