I noticed that the thumbnail of my dream Summertime on dream.wincustomize.com is missing a girl.
I take it those thumbnails are automatically generated and cropped but as it is now, it isn't representative of the actual dream. Is there any way that can be fixed?

Mmm, I've taken a look at your html-code and I see the image itself is not cropped but it's containing divs have the property overflow: hidden. If you would like to center the images inside those divs you can simply add this to your stylesheet:

.Dream_ScreenShots_Row img { margin: -6px 0 0 -30px; }

This would work with all thumbnails, including widescreen formats. It works in firefox and IE7, haven't been able to test in IE6.