i have some avi's that play but eventually stall after a playing for a few minutes. the stall does not occur at the same spot in the video nor does it alway stay stalled forever but instead plays staccato video thereafter or lagged audio requiring me to restart the video. i run it on both VLC and QT and get the same response. sometimes its even worse on VLC lagging almost as quickly as it starts playing. i have 512MB RAM on my machine and i shut down every other app open and still no success. i got the files from a fellow mac user and she swears they work cleanly on her machine. what really gets me is that when i pop it into our windoze machine it plays flawlessly. what gives? please help.