i've be have matching problem as most citizens next to the green peak contained by windorws medium player, but it is also occuring in every other player too, this simply happend a few hours ago for hte first time out of nowhere nad i hold no virus or anything
Answers: Unintall all version of DivX and XviD codec and install the following.
3ivX -
http://www.3ivx.com/download/
Also, if you enjoy QuickTime, kind sure it is up to date, it can effect other players but for.