The applet loading without user action after the Java update sounds like you had already allowed it for that site before (or maybe you haven't got the blocklist update yet for some reason?).
wow, thanks for that. I do have delicious installed. The fact that it could have been a plugin is why I didn't do a bug report. I just did a fresh install, still had the problem, and was going to go into safe mode after that. I wanted to see if I could isolate the problem first. Glad someone else already did.