Attachments not working?

Hi, hope this is the right place to post this...

I just started a thread, http://ubuntuforums.org/showthread.php?t=2318035, in which I was hoping users would attach images. But for some reason attachments don't seem to be working. I have clicked all the attachment-related buttons I can think of, and the site will not let me attach any images. No reason given either - it's like I haven't clicked the buttons given at all, no reasons for failure given or anything. That's while using Chromium: with Firefox I can't even find attachment-related buttons.

Is something wrong with the attachments functionality? Or has the set-up changed so I'm doing it wrong, other buttons need clicking or something?

Cheers, t0p.