Well guess Zach is not around http://www.photopost.com/forum/vbgal...n-gallery.html
I know when using custom styles that assists with some relative links and I beleive there is a spot to correct relative image links as well in gallery admin.
However doing the same thing I tell most photopost customers with custom styles this should help you.
In your vb
admin under the styles admin go to the global settings and third box down is the paths to images even your logo.
change to http://www.domain.com/forums/images/style/misc
This will solve all issues make your relative directory paths full urls and your issue will go away.