Yep - that's what I think. The problem is, I can't figure out where to change it! I don't see anything that's pointing to ...forum/whatever.php - it's all directed to ...henhouse/whatever.php. So I'm not sure where to change the path.
And it should be pulling those links over from vbulletin (it's integrated) - so I'm not sure that it's anything in the gallery files that I need to change...