Kotoeri in the latest OS X 10.6.3 update appears to have a flaw (at least for me). Occasionally, upon switching inputs, it will cause SystemUIServer to lag a lot… 15 seconds with no response, even.
So for now, I’m forced to use Google’s Japanese IME. It’s not as nice, IMO.
If anyone could help me, I’d greatly appreciate it.
Edit: fixed. It was Cloud.app that was the problem. They fixed the problem ;-)