I read other reports that ALL windows versions are effected. At least any version of windows that uses IE. I could not find the article that stated all windows OS's from 1990 to current (i did read it). I did however find another msn article that supports my claim. Detector mention specific OS's which is what the workaround will actually work on. If you have a win9x OS, you are still vulnrable except there is no work around on Win9x.
http://www.msnbc.msn.com/id/10651414/from/RL.2/
correct me if I am in left field on this.