Problem with Imported Images

I have imported posts into this site - http://dev.wearespeak.com/zimbo/?p=865

The posts that were created natively on the site are fine, but the posts that were imported have distorted images and text. Is there a quick way to fix this on all the ~150 posts that I've imported?

UPDATE - Here's an example of a page that is showing incorrectly - http://dev.wearespeak.com/zimbo/?p=865