If it's a generic thumbnail, it's most likely due to the system errors that are going on right now. Dag and Lucky are looking into it.

If there is a thumbnail present, but you want a different one, a silver star or above may invoke the *findthumb command. What video are you talking about?

I was talking about the small thumbs. If you go to http://www.videosift.com/video/What-Really-Happened-to-the-Life-Size-X-Wing
and look down at the bottom at "more videos submitted by DrPawn " you can see that two videos "You Dropped A Bomb On Me" and "Paris Hilton Spinning" show generic thumbs. Why do they and not the others?