tev_fixes_new was a massive merge that changed a lot of things. The first thing I absolutely recommend is updating to the newest mesa build you possibly can.
If that fails, you'll have to go through the tev_fixes_new branch and find out which builds your graphics card/drivers are having a problem with.
If that fails, you'll have to go through the tev_fixes_new branch and find out which builds your graphics card/drivers are having a problem with.