(Tested on Firefox 22, Monobook skin)

Steps to reproduce

• Go to the "The Damned Thing (short story)" page and edit it with the visual editor.
• Go to the "Gothic elements" selection, and select all the text from "Gothic elements" (Header) to "inadequate." (Last word of the section). This should also select the image.
• Click and drag the entire section, and drop it of before the "Analysis" section (Just drop it right before the A in that word, make sure the text entry | is displayed. The image itself will be gone. But for the fun part: Click anywhere on the editing canvas text.

Suddenly, your entire input screen will be white. What seems to happen is that the image is blanked (Replaced by a white square) and plastered full size all over the page. You can try to drag it away, but each time you try it will replace itself over the pages content.

https://en.wikipedia.org/wiki/File:Visual_Editor_-_Giant_White_Image.png contains a screenshot of the problem.

Version: unspecified
Severity: major
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=50643