I got the same error, and not-so-satisfying performance (a little better than 8.40.4

)
don't know what's the meaning of that frickin error
and by the end of the week I can tell:
on gutsy 7.10 I couldn't get 3d acceleration (famous MESA crap)
and on PCLinuxOS 2007 8.42.3 is some kind of working; 3d acceleration, performance didn't leaped from 8.40.4 as they promised, when I log out PC hangs (reset baby!) and when I try to pick the screensaver tab on KDE (right click on desktop), the window closes itself.
there are slight speed improvements on X-Moto (now playable), Nexuiz, and in some games. on OpenArena I had to migrate to Gnome because when I try to change system settings in OpenArena on KDE, the thing crashes.
GL-117 has better performance(no more low-fps warnings!), but when I move the target with the mouse, the whole thing freezes for a second or more so It takes me a minutes just to start a game.
Miss my 9800 PRO
conclusion: as I said before ATI made their great products useless. go green!!