I have a problem here. Im kind of an experienced mac user and yet still a novice. I have some .avi files that play and some that just plain old dont. I thought maybe the file was corrupt so i sent it to a windows machine. Windows media player 11 played the file just fine. I have tried the DivX and Flip4Mac player as well and still nothing but just audio. Quicktime is telling me that it requires a plug in... and for me this is the hardest thing in the world to figure out which plug in it needs. I found the smallest avi file i have which doesnt play and its only 1.8mb and uploaded it to the link below (thank god we all have macs and no one is worried about virus's huh... haha). http://www.yousendit.com/transfer.php?action=download&ufid=7EBA25B41D01A101 so if someone could download the file and see if it plays for them please let me know all of the plug ins you have for quicktime and a URL if you dont mind of where i can instal them for myself. again, any help anyone can lend is greatly appreciated. thank you.