Upload form does not work in Firefox 3 with Mac OS X?

Question

Today, I ran into this weird problem with a user using Mac OS X. This user always had a failed upload. The form uses a regular "input type=file". The user could upload using any browser except Firefox 3 on his Mac. Only this particular user was seeing this error.

Obviously, the problem is only with this one particular user.

Answer 1

User corrected this weird problem by recreating their FireFox profile. How to manage FireFox profiles

I imagine a re-install of FireFox would have corrected the problem as well.