I had an app written in beta 1 which was using Thumb controls on outer edges of a control. These thumbs let the user grab them and resize the control. This is now broken (with beta 2). I am guessing that what is happening is, with the new addition of being able to cancel the bubbling up of events, is that the Thumb control for some reason is eating the Left mouse down, mouse move, and left mouse up events. I can see the thumb actually change color when I press the left button down on it, so I know it is getting the event. Does this sounds like what is happening? If so, I would consider this a bug. It still seems like the event handlers that I am adding to the thumb would get called, but they are not. By the way the link that is supposed to give the details of the changes for beta 2 that is given on Scott Gu's blog entry talking about beta 2 doesn't go anywhere. Here is the xaml for one thumb. Note, the event handlers given here are no ...
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