Why do certain Library thumbnails only show with the name and a blank grey circle? (Ben and Ben Casual, Winter Queen Basic HiRes and Basic LowRes and Wing Spread Set, for example.)

They show up for me. So I'm not sure why you don't see them.

Edit > General Preferences. Make sure your thumbnail collapsing is off.

Attached Link: http://www.renderosity.com/messages.ez?Form.ShowMessage=2180621

Thanks everyone for the helpful replies. Guess I'll wait for the first Service Release. Hopefully it will correct some other annoying things too, like many lights from my P5 Runtime loading black, the frozen dialogue boxes when switiching Rooms (for example, if the Library Palette is open when switching to the Materials Room and the Materials Window overlaps the "Close" handle, the Pallette stays open (can't just double click in a blank portion of the workspace to make it close like in P5). Not to mention many Camera selction problems. The only way to change Camera views is with the Camera Control icons, and then the change doesn't show in the Camera Properties and Parameters Palette or in the drop down boxess at the top of the Preview Windows, or in the camera name label in the Preview Windows (which also doesn't work like P5 - i.e. clicking on it won't open the Camera Selection dialogue box). Trying to change the Camera selection any other way cause it to show in all of the aforementioned dialogue boxes/palettes, but the view in the preview or render windows does not the change at all.