I am new to Vegas but have used MS 3 for awhile. Athough I have not posted to this forum I do browse it a lot (awesome forum). I went to open a Vegas file yesterday and Vegas rebuilt the audio proxy for all the clips in the timeline. I then opened several other Vegas files from different folders and the same thing happened as well. Obviously there is no harm done but I am curious what happened to the audio files that required Vegas rebuilding them--I am certain that I did not delete them. I did run a Norton utility from Norton System Works to check registry, etc. prior to openining Vegas. Could that have had anything to do with it?

FYI--My PC is a Sony Vaio, XP Professional, Pentium 4 with Giga Pocket stuff, 120 gb HD, 3.4 ghz processor, 1 gig ram, etc.

Any thoughts from anyone?