I took care of it. That took me five minutes
If you'd like to fix it yourself right now Jeff, open up this file...
yourwebsite.net/components/com_comment/joscomment/security.php
...and go to line number 30 or around there, just search for the text
?refid= as it might have changed between Beta1 and my local trunk copy.
Change the line from...
."<img src="". JURI::base() . "/components/com_comment/joscomment/captcha.php?refid=" . $refid . "" alt="Security Image" />n"
...to...
."<img src="". JURI::base() . "components/com_comment/joscomment/captcha.php?refid=" . $refid . "" alt="Security Image" />n"
Well you might have noticed the /components there yourself, but I make a habit of being verbose in many things I say