Our host is having problems. This caused 10 hours of downtime yesterday, and it might be the cause of what you saw with these database errors.
If you do experience this problem, please let us know on this thread, or get in touch using the contact page: http://youlookfab.com/contact-us/
If you can, please tell us the name of the topic that caused the problem, the time it happened, the browser you are using and error message itself.
Thanks
Greg