Latest iClone 8.5 (8.5.3300.1) simply crashes when trying to copy keyframes sometimes. I tried to narrow it as much as I could, but it's hard to find specific reason for the crash, I've only noticed that it happens when copying keyframes, and occasionally, when pasting them. iClone seems to process for a couple of seconds, and then it just closes without any prompt.

I've tested it on 2 different computers, and both had the same problem.