Since yesterday whenever I click on logout I get a messagebox with the message: undefined and two options: Ok and cancel. Ok logs me out cancel keeps me logged in. I use Firefox 2 (got it updated to 2.0.0.6 just now).
Anybody else has this problem?
Thanks for pointing this out. I upgraded to vBulletin 3.6.8 yesterday and it looks like they changed the logout code. I've updated our style to reflect the new changes, so the logout links should work now.