I have a picture contained within a drawing canvas in Word 2007. I made the mistake of right clicking and choosing format picture. This is the result:

Regardless of the values I enter into any of the boxes, this message appears:
The measurement must be between 0 px and 227 px.
Even clicking cancel causes this to appear. As such, I am unable to close the format picture window, and save my document.
How can I get this stupid dialog to go away, without ending the process in task manager?