.avi files in Quick Time?

Is there any kind of plugin for QuickTime that will allow the program to play avi files? I've already got Flip4Mac...I think that one just allows it to play .wmv files. Any help would be much appreciated.

I am not sure about quicktime pro, but the free one doesn't seem to like avi's too much. I have used VLC with good results to play avi's. Perhaps you could try that. Although it would be nice to be able to use 1 player for everything.....

Try here:

http://www.mac-forums.com/forums/showthread.php?t=19015