Heh, could you try posting the image and not the teeny tiny thumbnail.
--------------- Added 17 Jan 2009 at 02:53 ---------------
I can barely see the image, but it looks to me like one of your PM's previews is stretching the page out. This happens sometimes when send URLs or post code in their PMs.
Not possible to see what the reason is from this screenshot. Would need a screenshot that shows the right side of the page and the entry that causes the layout to break.