In GBC Wario Land 2, sometimes the emulation slows down for no apparent reason when playing, to the point where the game runs at less than 1 FPS. Savestates made while the game was slowed can't be fixed, even when re-opening the emulator. Fastforward is affected as well, it runs at a decreased speed. When this problem occurs while recording a movie, the movie will desync upon playback.

The slowdown problem occurs in many parts in the Out of bounds area (you can use a wall glitch to access said area), and in the first room in the "really final chapter" so far.

http://dehacked.2y.net/microstorage.php/info/1603526911/wl2cTest.vbm This movie places you in the Out of bounds area in Chapter 2, Story 1, room 2. Jump around for a while and eventually the emulation will slow down.

This problem occurs in the latest VBA-24-m revision, even though I think at one point it was said to have been fixed. Other games may be affected as well, I don't know.

Additional info: The problem seems to happen if some condition is met. Once it is met, the emulation will slow down everytime you save a state, load it and repeat (save a new state, load that, etc.). http://www.youtube.com/watch?v=sbLuPvgP8SM

So this is a GBC emulation bug instead of any movie recording bug. It is not the same issue as the one that revision 371 resolved.

Fixed on r391.