That's what I'm seeing (OK, he doesn't mention the insane memory usage, but still...). Unfortunately, it doesn't look like anyone's come up with a real solution; I'll give the "killall SLPlugin" method a try.Anyhow, the result of all those (useless?) [SLPlugin] processes in the background is heavy swapping, manifesting itself in "lag like hell" (framerate drops from around 25 to 1.5). A relog fixes it (of course), but only for a short time.
UPDATE: I tried it; didn't do a bit of good.