I have seen exclamation points, not question marks, but I believe they mean the same thing. The cause of this problem in most cases is the media file that is on the timeline has been moved or is missing. If the media file was in one location on the hard drive and moved to another, Pinnacle Studio will search for missing media automatically whenever a project is opened. So if you have missing media, close the project and open it again.
If closing and opening the project does not help, please try and move the files back to the original location. Hope this helps!
2:16 pm Thursday
Feb 9, 2012