Isn’t there also a possibility that if there’s some kind of an adblocker or something (like what Desiderius Price mentioned) that it would block some features, like the status bar?
Okay, I’m just going to toss this out there, but have you cleared your browsing history and cache? And perhaps also the AFF cookies? Our cookies will reinstall when you visit the site, so that’s no problem, but sometimes cookie strings get corrupted, and browser history can store older versions of the site which might create display issues.
While I see @BronxWench’s directions above, normally I go to my profile and do it there. A prompt at the top of my activity feed reads “Write a public message on your own feed...” Click there and it becomes an edit box where I can put in...whatever, hit “Submit Status” when done. Now, it’s javascript making the change (prompt → edit window), so maybe that’s disabled? I’m guessing a script/ad-blocker is fouling this up. @Deadman, do you have something like U-block or no-script installed?