I have photoshop CS 6 on a 12-core mac pro, using OS 10.7.5. The liquify filter in Photoshop worked for about a year since I installed CS6. All of a sudden the liquify filter stopped working. The cross hair (brush) for pushing pixels pushes the entire picture. I can't change the size of the brush or tools in the filter. It worked fine before. I tried throwing out the preferences and resetting the performance settings too. Nothing has worked so far. I used the filter a lot and it's very frustrating to have it just STOP. Suggestions please.