Okay, so I'm new to Sony Vegas, but I know the guides and other topics here have helped me out tremendously =/ although, I just skim. Anyway, I have a little problem, and I was hoping I could get some help on it ^^;
Whenever I apply an effect to a clip, there seems to be this evil little square box that just sticks somewhere in the clip's preview, and doesn't show the effect being used in that square o.<; It's a new problem, and it didn't do this before. I don't know if I touched something or what, but now it looks like this:

The little square only shows up in the preview. When I render the clip, the effect spans the whole thing. Any ideas? xD;;;
And while I'm at it, is there a way to lock a track so you can't touch/edit it at all? ><; I keep accidentally splitting my audio.