One thing i have noticed post-SR1, when my comp goes into sleep mode, then I bring it back up, the library I was in pre-sleep has nothing in it. I have to use the "up" button, and go back to the same library to see the thumbs again. Strange behavior, but I expected SR1 to fix somethings and "break" others. It's inconvenient, but SR1 is still worlds better than pre-SR1.