Sorry for bump but i'm having the same problem, i formated my computer win 7 64-bit and downloaded both gta united 1.2.0.1 and 1.1 and when i press f3 to see an replay it crashes.
It's not the replay because it works on gta san andreas, and I just found that if you run the replay on SA then open the united and run the same replay it actually works but when the replays ends unless you press f3 while the replay is running it will crash.
Someone can solve this problem please?