http://bugs.winehq.org/show_bug.cgi?id=22779
--- Comment #2 from diafero@arcor.de 2010-06-12 10:22:36 --- Things got much better since I upgraded to 1.2-rc1 (I'm now at 1.2-rc3, with no further noticeable changes). There are still some glitches, but Portal is actually playable now (without modifying any command-line parameter, but with the in-game graphics setting turned quite low). Main problem now is the low framerate, not the glitches.
The glitches in Uru seem to be completely gone.