Can see but not click Quicktag buttons in editor.
I'm just rewording this post to make things more clear.
If I open a Wiki page and click Edit, the quicktag buttons for formatting (bold, italics, bullet list, etc.) seem to do nothing. I click in the text area where I want the code to go, I click one of the quicktags, and the focus shifts out of the text area and nothing else happens. No javascript errors at the bottom or anything.
HOWEVER, If I click edit and then Preview, or Fullscreen Edit, the quicktags work fine. If I exit Fullscreen Edit back to the default editor, the quicktags continue to work fine. If I save and then edit the page again, quicktags are once again broken unless I first preview or use fullscreen edit first.
This is happening on 5 computers running everything from Windows XP to Windows 7, in both IE and Firefox. Javascript is enabled, as proved by the fact that it works fine, just not in the initial edit screen.
I was using v2.2 when this began, cleared cache, upgraded to v2.3 and then v2.4 and did the upgrade stuff, cleared cache again, etc. I tried running a file check but it just drops to a blank screen after a while, and yes I changed php to a longer timeout.
I did make some configuration changes but none of them should have anything to do with this, and I've since gone through and reversed any changes I can recall and have been looking for others with no luck. I'm completely stumped.