Ok, so the users of my forum have brought it to my attention that thread prefixes are no longer working anywhere on my forum. This is troublesome since I have a few sections where thread prefixes are required, so my users are unable to use those sections of the forum. I've tried clicking on the thread prefix dropdown menu, and nothing appears. No menu at all. This happens in all forum sections. I've disabled all the plugins/addons on my website, and tested with multiple browsers and the problem still remains the same. I have no idea how this could have happened, since I haven't done anything to my website besides install Xen Media Gallery and remove sonnb's xengallery. Since this is still an issue when disabling all the plugins on my site, i don't really know where to go from here. I've also tried rebuilding the caches, re-saving the thread prefixes and groups and still no bueno. can someone give me some advice?