Image and Media control do not accept the drop even after Allow drop is true

In Silverlight 4, I have a button with AllowDrop = True. If I drag a file and drop on this Button, drop event fires up and I write some 开发者_StackOverflow社区code in it (regardless of whether I run Elevated or Non-Elevated!)

Same drop event doesn't seem to work for at least 2 controls, mediaelement and image control. Am I missing anything?

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Finally, got this one fixed. Basically, if you have don't assign a source to the image or media control, then there's nothing to hit test against for that control, so hittesting fails and the event is not fired on the control.

Will keep everyone posted in case I find more.