Here's the deal. When i'm on my Macbook (external display not connected) and I open up the iMovie application - it won't show up on the screen. When I press the expose button, its there (the iMovie home screen is visible). When I click on it, it just takes me to my other expose apps i.e. safari or firefox. Gets even stranger... When i've got my external 24" display connected, it works a treat and no issues with iMovie. Anyone heard of this particular problem before?