So, I should ask for help before I kill something.  I'm working on a new header and I have a picture of Natalie Dormer but I want to change the color of her dress.  I was using the Quickmask tool to select it and change it and it was working fine and then all of a sudden it just stopped working.  Like it says its still working but you can't see any of the brush strokes and it's not red anymore and I don't know what happened.  Anyone have any idea what might have happened?