Emulator

Basically, savestates save and restore "/tmp"... but never touch anything else, even when you're recording. Therefore, it's easy to cause a desync with a recording that loads a in-game save: if you try to continue from a savestate, the save data will be missing. Generally affects every Wii game which supports saves. Probably easy to fix.

Example of how to reproduce this, for completeness:

1. Start recording Twilight Princess Wii
2. Press A+B to start, click yes to the "create a new memory file" prompt, start a new file
3. Make a savestate
4. Press home, reset, then go through to the save screen; "create a new memory file" doesn't appear
5. Stop recording, save the recording.
6. Load the recording, and load the savestate.
7. Let recording play through to the save screen
8. Observe desync: the "create a new memory file" prompt appears