MyBB Community Forums

I cannot seem to upload any attachments to my forum when using Firefox 5. I get stuck in an infinite loop after selecting the file, and pressing any of the add/update/post/preview/save buttons has no effect. The only solution at this point is to navigate away from the post a new thread page. I have also tried posting and then attaching using full edit, but same result.

The uploads folder is writable - I have no problem attaching using Safari. And I can upload attachments on the myBB community forums using FF (see below).

So what's up with my setup?

It's a private forum, so no URL to share.
Running new install of myBB 1.6 with Dawn theme.
Screens if useful below:

Safari:
[attachment=23270]

Firefox:
[attachment=23271]

There's not really much we can do if we can't test it. The form is a standard upload form like every other one on every other website you've been on, so it's not something in MyBB that's broken, and as you said it works here so it's not a MyBB issue, however without a URL to test it we physically have no way of finding out what it is.