Hmmm... I've never come across anything like that. I don't play movies in windows so I guess it doesn't affect me anyway.
Back to the original topic. I can't recommend mplayer - installed from source - enough. It's not that hard and the mplayer site tells you exactly what packages you'll need in order to compile it. It's really worth it. I never used to think so until my DVD player started acting up in linux (on another computer). All DVDs played really crappily in every player. Really jerky and the sound sometimes cut out. In desperation I looked to mplayer to solve my woes. It did to a large extent. It wasn't quite as good as it used to be but it was better BY FAR than any other player. I tested xine ogle and vlc in addition to mplayer. I'll admit that it's a little harder to install but definetly worth it. If you REALLY don't want to install from source, the mplayer site has rpms for you. There are some there optimised for certain CPUs and the like. Have a look: www.mplayerhq.hu