When I right-click an image and then recant, clicking outside of the image or the pop-up menu, I often end up with the image enlarged. This is because the message that contains the image tends to be larger than the image itself. This is very counterintuitive - on would expect simply to cancel the right-click.
Either the message should be reduced to the size of the image, or a click in this case (when the pop-up menu is shown) should not be interpreted as if there were no menu shown