I have PD7 (I have been using 1928, although I did try the patches too) a part of the program doesn't work, BUT used to. I can't trim on the timeline, I can in PIP. I can multitrim in timeline (which creates a transition problem BTW). Every time I try just the trim in the timeline the program crashes. I have uninstalled and reinstalled (cleaned registry etc) and in fact the first few times the trim would work, until I closed the program and reopened it, then it stopped working and would crash. I have updated my drivers and I have defragged. It was working up until October 19. I have done a system restore back to the 18th, just in case. That one item still doesn't work. I have even thought that perhaps my original .exe was corrupt and installed the .exe from another spot, still the same thing. I am assuming I have a software conflict, but for the life of me I have no clue what or where. All of the programs and updates, of which there were few, were reversed and as much as I could find, I wiped the registry. It seems to be the only thing that isn't working (so far) but since I use it all the time it's a pain.
I am imagining I will have to wipe my computer clean and start over, but just thought I would put this out there in case someone else has had this issue.