Currently Being ModeratedDec 31, 2012 8:44 AM (in response to Mark Hollingsworth)
Can you do the following so we know what kind of clips we are dealing with?
Right-click on one of your Event clips in iMovie. Choose Reveal in Finder in the pop-up menu. In the Finder window, right-click on the clip and choose OPEN WITH.../QUICKTIME PLAYER. In QuickTime Player, click the letter i while holding down the Command Key. This should open the inspector. Tell us the dimensions of the clip and everything that is listed next to the word FORMAT.
If you prefer, you can just attach a screenshot of the inspector window.