I find I get graphical corruption in my window borders if I run KDE then run UT2004 - when I exit UT the borders of my Windows have garbage in them. Refreshing the desktop doesn't fix it. Even if I exit the app and restart it, the same garbage appears (corrupted image cache?)
Also, the Render acceleration still fails lots of tests (although, yes it does say experimental
I tried rendercheck-1.0.3.
I have a Dell Inspiron 8600 with a Fx5200Go running -current (not supported I know).
It's nice to be able to use real threading libraries now! (6113 didn't work and 4365 only supported libc_r).