The problem doesn’t appear to be the fault of Slimbox2 or WP 2.8, it’s something else related to your site that’s causing the problem. I’ll still see if I can figure out what exactly is wrong.
How are you inserting the images in the first place?
It’s the url, you have [code:3mnun4rm]<a rel="lightbox" href="www.coleborgia.com/portfolio/officergouge/preview.jpg" title="Permanent Link to OfficerGouge.com">[/code:3mnun4rm] you should have [code:3mnun4rm]<a rel="lightbox" href="http://www.coleborgia.com/portfolio/officergouge/preview.jpg" title="Permanent Link to OfficerGouge.com">[/code:3mnun4rm]
You need the http in front of it.