Just got an FZ20. Checked out the external flash hot shoe function with my flash unit. No flash. The in-camera flash works correctly. I don't know if this defect is a one-off or if more of these rigs have the same problem. If you have one of these cameras still within warranty and haven't checked this function, you might wish to do so. Just make sure beforehand that your flash unit meets the trigger voltage requirements. Incidentally, the lady at the Panasonic 800 customer service number was most courteous and helpful. She quickly set me up with a reference number and a list of authorized repair shops in my area.