SSBB crashes/ can't save

[Echyon]

When playing versus mode in SSBB with Lucas, Dolphin crashes after the match is completed. I've tried changing Graphical settings, but nothing helped. I also tried the unlimited jit thing, but then Windows says Dolphin stopped working immediately after starting the game.

Another issue is that I can't get any further with the game using characters that don't crash, because any new things I do aren't saved. I had this problem before, and after installing a newer version of Dolphin I was able to play on for a little while. But, soon the savegames weren't updated anymore.
Any help with either of these issues would be much appreciated.

Since everyone likes to see the specs, here are mine:
CPU: Intel Core2 Duo E8400
GPU: XFX GeForce 9800GTX+ 512M
Memory: 2 GB DDR3 RAM
OS: Windows Vista Business SP1

[nosound97]

Both issues are known, you gotta live with them