I have really been working on back tension recently, and it helps. Its funny how you practice till you think you are automatically doing something right every time, only to realize that you have deviated considerably from good form. (This applies to a lot of things besides archery.)
Terry, now that you mention it, I have noticed that alignment may be off, too. That one is a problem for me, because I often don't seem to notice it until somebody points it out to me, or I just get so sloppy it jumps out at me.
Looks like I need to have a few very serious forms sessions. Thanks for the advice from everybody. TSP, I will try to conciously push with the bow hand as a means of maintaining the back tension. Thanks, guys.