The edit issue is definetly not a browser problem. I have run tests using Firefox, IE6 and 7 on 2 systems and a virtual PC, clearing cookies and cache to make sure it is fine.
Firefox does not throw an error, but it does not do anything, IE 6 and 7 throw the error listed above.
Here is a list of my mods. It may help if other people who have the same problem post a list of theres to see if we have a common element.
Code:
FlashChat Integration 3.08 Integration of Flashchat and vBulletin 3.6
Members who are using flashchat 4.37 Display members who are currently chatting in Flashchat.
Members who have visited the forum 4.39 Display members who have visited the forum.
Mini Navbar 1.0.4 Places a breadcrumb from the navbar on the bottom of a thread
My Smilies VB 1.02 Custom user-uploaded smilies
Restrict URLS 0.1 Restricts users from posting URLs until they have an admin defined number of posts.
Smilies in Quickreply 3.6.x Show Smilies in Quickreply.
vB Spell 0.10.2b vB Spell allows you to provide a spell checking window through your editor interface.
vbgooglemap Member Edition by StonyArc 2.5.2 Display user location based on Google Maps API
Zoints Profile System 2.1.4 The Zoints client forum profile linking system.
Zoints SEO 2.2.2 The Zoints Search Engine Optimization Package
Zoints Thread Tags 1.2.1 The Zoints thread tagging system
[Sniper] - Mood Manager 1.2.3 Allows users to manage there mood
I am also still having the language bar issue. It goes away when I rebuild, but eventually comes back after editing the settings.