caribguy - 7:06 am on Nov 18, 2010 (gmt 0)
For me this probably means increasing the size of thumbnail images.
Or remove them altogether and make your text stand out.
Branding / Logos = allowed
Decoration (photography) = disallowed
Result: the content stands out, and the organization / format as displayed in the preview looks clean and inviting.
As a potential visitor, I would want to take a closer look...