I have mandriva2006 powerpack edition.... so I know what I am talking about... not only I had to edit resolv.conf so my lan can be recognised, I had several other probs, software related... one that comes quickly in mind was the sound system, with a plain sb live! ... it stuck often , while on the same pc windowsXP run perfect.
also my Philips saa7135 tuner card was not recognised, and driver was a pain in the a$$.
IF it had better commercial software support, linux could be competitive to windows, but for now, at least for me, it offers nothing better, only lack of software... and more eye-candy! lol