UPDATE: Problem solved! It turned out that it was a corrupted custom preset render file. I recreated the file and everything works fine now. This was hard to track down so I hope this helps someone who may have a similar problem at some time.

Running Vegas 6 w/ all updates. I recently installed Vegas 7 / DVDA4 w/ all updates but I am not using yet due to a missing serial number ( an interesting story but unimportant to this post). Since installing Vegas 7 on my machine (Athlon 64x2 4400, 2 gb RAM, Win XP) I have an annoying "click" almost like a metronome sound that appears when rendering to MPEG2. (The preview in Vegas plays perfect.) It is just a single audible "Click" that occurs about 1.5 secs into the finished video, although there is no video artifacting.

This is the first significant problem I have had with Vegas. I have tried several experiments or work-arounds and nothing seems to work. (some of the things I have tried are: rendering the project's veg file in a different project; trimming the first 2 seconds off the project; sliding the project to the right and rendering only the loop region; deleting the title and renfering; trimming the beginning of the audio files in the intro to make sure they aren't corrupted (they aren't)).

This is happening to me not in just one project but in multiple projects, although I did make a test project consisting of a single video/audio clip and it worked fine. I have seen some reference to problems with the alpha channel in 7.0c but its weird that it might affect my existing installation of Vegas 6.

Any help would be greatly appreciated!