that's an intentionally cryptic message i put in to try to keep spambots out; it means the IP address you submitted from is different than the one you loaded the page from. I had hoped it would never affect users, but I guess certain proxies or firewalls can cause it to get tripped. I actually get that sometimes at work, and my workaround is to "preview" and then submit.

Perhaps i need to relax or remove that restriction if it's causing people trouble.