Where is your right thumb during the swing?

Assuming you're a right handed player.  It sounds stupid, but I might have figured out a huge reason why I tend to fade/slice so much.  I've always had my right thumb running parallel to the shaft, instead of wrapping it around.  It's just always felt natural that way, but when I wrap it around, it obviously closes the face a little bit.

I forced myself to hit balls yesterday with the new grip the entire time, and I've never hit so many straight balls in my life.  This is probably all a no-brainer, but I'm excited that I might have figured out something that will make a big difference.  Where's your right thumb?

http://thesandtrap.com/t/71954/right-thumb-position-on-grip

Mine sorta wraps around the shaft..

That's my typical grip.

Yeah I took a closer look after you mentioned how weak it was a few months back and have worked to strengthen it. SO much more consistent now!

Since my backswing change, I found that I like to have the right hand more up the left hand. I use to see a pretty good gap between the right and left hand. So the right thumb would down the shaft more, not over it. Now I have the right hand further up on top of the left hand. Much similar to the figure on the right in that image above, and it seems to help keep my hands from rotating over in the backswing.

Helpful posts.  Thanks!

A guy at the driving range near me the other day changed my grip where the thumb goes over and just lightly touches my finger instead of it being parallel to the shaft. I hit 5 of the best drives ive ever hit after that. Then since it was almost closing time he let me go down range onto the range and just hit pitch shots with the new grip. I was amazed that I got such clean contact with the ball. I was taking my divot in front of the ball more often than before and this is within 30 minutes of changing my grip. It may have been that little bit I needed to start improving my game. I am now a firm believer that grip completely changes the game.

on the grip always!

i try to let them point down the clubhead