Logging out and logging in again solves the problem for now but it's kind of annoying.
Using Firefox 29 on Linux Mint. Let me know if you need more info.
EDIT: And the search box on the left side gives me a white page and this link: http://www.urbanterr...arch_filter_app[forums]=1
This post has been edited by zyzz: 12 May 2014 - 03:09 PM