Look at your HTML source, you have
http://www.photoplog.com/forum/... things in the HTML source, meaning that you probably didn't go to vB ACP -> PhotoPlog -> Modify Settings and modify the new settings, specifically the 'Absolute Links' setting, where you now need to specify the links (i.e., take out
http://www.photoplog.com/forum/ from each line in the text box and replace with your site information).
Granted it's sort of a PITA to do it the first time, but it'll be remembered once you do it, and it should prove to be a more flexible solution, in that you shouldn't need to edit templates in order to get absolute links to places outside of your board.
Note on Official Support: With 50 some pages, assuming 15 posts per page, and over 700 posts, all in one thread, official support for this mod is now held off-site. Apologies in advance for possibly having to register at yet another forum, but IMHO support would be better served elsewhere at this point.