[Issues with video card]

I am glad you posted this, as I get similar artifacts in both SL and emerald.  I just had no idea how to describe this problem.  My computer doesnt crash, but the viewers become totally unusable.  I am also using a Radeon card that is not listed as a problem card.  I will try this fix.  Is it also possible there is a problem because I have a core duo processor?  I understand that SL does not like duo processors.