After logging in, the progress bar stops at about the halfway mark, saying "Loading Multimedia" over a SLim notice. SL is taking 98% CPU, but there's no network activity, and the programs tab in the task manager shows two Second Lifes with "Not Responding". It's been sitting there for about 10 minutes now.
I've tried killing it and restarting a couple of times, I also went into preferences and turned OFF streaming audio and video, but it's still sticking there.
It worked fine last night. I haven't changed anything on my system since then.
---
Never mind. A reboot fixed it. (But then, problems that go away by themselves always come back by themselves.)