Hi Angela,
I eventually I did find a solution to this, although I’m not sure whether it’s the only solution.
The problem disappeared when I upgraded the OS to Snow Leopard. I didn’t do a clean install of the OS or anything; just put the Snow Leopard discs in and installed it over the old OS (bad practice I know). Once my Mac was running Snow Leopard I did a fresh install of Final Cut Studio (making sure I’d backed up things like keyboard preferences etc to avoid having to re-do them all over again), and then opened up the Final Cut/Motion projects again. This time there were no crashes and everything’s been running smoothly since.
I wonder whether Final Cut Pro only works fully with Snow Leopard? I’m pretty sure the system requirements state that it’ll work on Leopard but I can’t quite remember now.
I think since I opened this thread there may have been a few software updates to FCP which may be worth installing in case they include a fix?
Hope that’s of some help!
Thanks,
Kev