This is caused by bad Clamping/Rounding settings (under Emulation Settings -> EE/IOP and VUs)
Just set them all back to dafault and it should work fine again.
maybe you have odd settings for clamping and rounding modes. They can be found in the emulation settings in the first two tabpages. Normally you should always use the bold default values.
I'm sorry, I didn't see that post.
Lemme try...
Well I'll be!
Thank you so much, Grove4L!
I must have changed that setting for another game and forgotten about it.