I'm trying to set up an account on Mantis, but it won't let me. I've gotten this about 20 times:
APPLICATION ERROR #2800
Invalid form security token. Did you submit the form twice by accident?
I'm familiar with CAPTCHA and I am reasonably certain that I should have gotten it right at least once in 20 tries, even if I blindly flailed at the keyboard, so I suggest that there is something else going on here.
Thanks for looking into this, and keep up the good work, everyone.