I just got the Quicktime Pro serial today, so now I know why you don't go back to just player. But I am having trouble trying to export a .mpg movie to .mp4 or anything else and keeping the audio. Specifically, the .mpg file has an audio track in it, 'cause I can hear it playing. But when I go to Export... and go to the options menu for MPEG-4 I get in the audio paragraph: "No audio will be output because this movie has no audio tracks." I tried to export all the audio using iTunes and Audacity, but it cannot be done. I don't get this problem for .mov files, but for .mpg files I do. Why? Also, Quicktime unexpectedly quits. Just a minute ago it was exporting a .mov movie into MPEG-4 format, and it quit while I was browsing the forums. I did a fresh install of OS X on my Cube with 10.1.5 yesterday. 1GB RAM.