Sorry to open yet another V7 thread.
Just downloaded the V7 trial, opened up a PAL Widescreen DV V6 project I have been working on as a test. I am only getting 12-13fps playback. Back to V6, 25fps without a problem. Anyone else noticed any playback issues? I will check my settings again when I get home from work. Using the default V7 settings at the moment. Not using the new preview scaling feature or an external display. Preview window is set to Preview (Full) in both V6 and V7. I can't think of what setting might cause this kind of problem off the top of my head. Of course V7 may have introduced something I am not yet aware of.