I have recently been running into a very annoying problem in Premiere. When I import my 720p footage it is about double the size it appears in the preview window. I checked my composition settings and they are at 1280x720 which is (to the best of my knowledge) the correct size for 720p. My settings are the same as It has been before so I have no idea why it is doing this. Any help that can be offered would be greatly appreciated.
Have you tried right clicking the clip on the timeline and checking 'SCALE TO FRAME SIZE'?