Thank you for bringing the issue with cropping large images to our attention. Indeed the behavior can be improved. We logged it for fixing and the next service pack (SP2) for RadControls Q3 2008 will feature a better cropping implementation. I am not able to give you an exact date for the SP yet, but most likely it will be sometime early January.
As far as the other two issues reported: flip and rotate do work
in FireFox - only that the image is not instantly updated on the client-side (it is, however, flipped and rotated on the server, when saving it). This is not a bug, but rather the lack of proper support of FireFox for doing tricks such as flipping and rotating using client code. Now that FF 3 is out, there are some new CSS and Canvas improvements to the FF engine, and it might be possible to implement the clientside functionality properly.
the Telerik team
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