That is weird. I have only seen those during searching but not prior to posting. Are you still getting this? That was an awful CAPTCHA text...I should probably just turn it off at this point. I think most spammers, etc have already found ways around them and they only annoy real people.
Sorry for not getting back sooner. Only happened that one time, so maybe I had a second window open and clicked a search by accident? Don't remember doing that though. No biggie, perhaps a one time glitch.