I just reformatted my computer, and I've got the latest DivX and Xvid codecs installed, but some of my HD videos that used to play just fine now stutter. Is something missing? I've already tried the file in PowerDVD, BSPlayer, DivX player, Winamp, and WMP. Here are the specs of the video: Video Format: MPEG-2 Resolution: 1440x1080 Display Aspect Ratio: 16:9 Frame Rate: 29.97i Average Bitrate: 20 mbit/s Audio Format: MPEG-1 Layer 2 Channels: 2 Sampling Rate: 48 KHz Bitrate: 384 kbit/s Container: MPEG-2 Program Stream Length: 2:45 If anyone can help me out with this problem, it would be much appreciated. Thanks!