I noticed the other day that on one of my forums the media tab (for the XenMediaGallery) and the sitewide footer links (@BamaStangGuy's add-on, found on all my other sites) are both not showing up. The media gallery still shows on the index and is accessible and functional otherwise but the tab is missing. I've reinstalled these add-ons, turned them on and off and on again... I can't figure out what the hangup is.
I'm using a different style but I experience the same issues with the default style.