(In reply to comment #8)
> (In reply to comment #7)
> > Indeed, the resolution is the problem,
> > 
> > running any application in my system resolution (1680x1050) breaks
> > rendering, something like 640x480 has no problems. It also corrupts things
> > like glxgears while I resize them (from any resolution).
> 
> What I mean is, glxgears gets corrupted if I resize its window while it is
> running, it displays corrupted blocks

I am also seeing this resize corruption on HD4890 (native res = 1920x1080).

Some demos seem to start corrupted - gearbox starts with band at top.

Projtex - less reliable, may need other demos run first, but may start totally
corrupted then correct when a key is pressed.