i downloaded a Simpsons episode in avi format and when i tried to watch it, i got an error saying that the required compressor needed could not be found. Is it a general rule that macs can't play avi files or is it just that my quicktime player is too out-dated (i think i have version 6 or 7, im not sure)???? Another thing, if it was able to play on Windows Media Player or Real player, it would do that automatically, right?