The only thing I'm working on when I have time is trying to figure out the lockup issue, but it's hard since it's nearly impossible to reproduce. That, and the long file name problem in the recursive directory routine are really the only two identified major problems right now.
I'm hoping to release v6.4 which fixes just those 2 problems and call that the stable release before making any more changes. I think it's a high priority to get something really stable that people can use with some level of confidence. The good news is I haven't seen a lot of issues with people reporting crashing recently so that must mean I'm doing something right... So double check that there aren't crashlogs lieing around you haven't sent me