The site is firerescuephotographers.com/gallery
on the PhotoPost NavBar is. Home · Search · Register · Login
the link Register points to the vb3 forums register link
the login points to the gallery login directory
Even if a user logs in the through the forums are and comes back to the photo gallery the PhotoPost menu bar login link still points to the gallery directory so if they try to logout using that link it doesn't work.
As long as a user the login box upper right corner or in the forums area everything works well.
There really isn't much use for the extra login/logout link in the PP menu bar anyway so maybe it could be removed.