This has happened once before where features are missing from StackOverflow
- I cannot click "StackExchange and the top left corner"
- The formating buttons are missing from the edit page (see screen shot bellow)
I tried opening and closing my browser to no avail. I'm using FireFox 21.0 on Windows 7 64bit. Here is what I got from the console (after clearing it and loading StackOverflow)