I must have ticked off (or on?) a box by mistake. Editing (Vegas 10) for about an hour and everything was working normally. Then things changed... when dragging (moving) a video track the audio track is not moving along with it. I do not have "ignore event grouping" checked. I'm guessing it's something simple, but I can't figure out what I changed. Suggestions?

Never mind. Figured it out. Grouping goof. Sometimes it's the simple stuff.

I use the UNDO button often. lol
My lighting console has an "Oops" button that'll allow you to undo up to 20 steps. It's a life saver!

www.sublime-lighting.com

Herm, maybe you accidentally pressed the "U" button (Ungroup) with selected clip.
Select both video and audio, and press G (Group).

I think it's control, shift, U, or just press the lock icon.