Same problem for me today!
I too updated to Mac OS 9.2.2 a few days ago, but Limewire worked fine. Until two days ago. The GUI started behaving strangely (I wasn't able to switch smoothly from search to the other sections). I thought I'd reinstall Limewire today and now, I've got exactly the same Java error message as you, guys. That's really an epidemic!

Sylvie