skitch stops my mac from waking from sleep properly

I love Skitch, but I've had to stop using it -- it now seems pretty conclusive that it prevent my Mac from waking from sleep properly. This happened on Tiger and I assumed it was some deeply-rooted system misconfiguration. But a clean install on Leopard saw the problem recur. I started eliminating always-open programs and it's pretty clear: Skitch is to blame. I could live with the runaway memory usage, but having to close and reopen my machine several times, or wait five minutes with the eject button held down -- that's too much. I hope you guys are able to track this down so that I can start using Skitch again.