Every time I go into a thread, type a reply and press Post, I get a generic error message claiming there was something wrong with the site, and to try refreshing. I refresh, and get a Message Not Posted page with an admonishment against spamming. "Spamming is not permitted! You have exceeded the number of posts permitted in the time span. Please try again later."

When I return to the forum and the thread, however, I find that the message I'd typed was indeed posted, despite the original No-Can-Do page. Irritating, but not life-threatening of course. Any suggestions?