I was having an issue with content disappearing from my library. It was like playing runtime rolette as to what would show up and what wouldn't. I actually amused myself refreshing folders for a time. Anyway... I emailed smith micro who I have to say responded within 10-15 minutes of my initial email to them. They sent me a link to the newest service release and it fixed it right up (so far) as well as the speed of my indirect lighting renders. Don't know if you've tried it yet... but it can't hurt.  Go to the site and check out the updates.. there are 2.