ReCaptcha and FancyCaptcha bouncing back after correct answer!? Ie. they are broken.
Maybe you should try upgrading to 1.17.x. and try again. ConfirmEdit seems to use some functionalities only available in recent versions. --Bachsau 14:30, 16 October 2011 (UTC)
For the record, 1.16.2 was the stable version of MediaWiki recommended on the website when I installed the ConfirmEdit extension.
Running ConfirmEdit on 1.16 since some early alpha in 2009 without problems. Maybe switch to simple math (at least to have a proper process). Also bot-looking accounts can be human too (that's what I experienced in the past months) so captchas like simple math are not working 100% well.
I stopped them by using $wgCaptchaQuestions using fairly simple insider questions that only my target group can answer. That stopped all spammers from registering and editing. --Subfader 18:49, 16 October 2011 (UTC)
I did say Simple Math does work (in the opening edit) but the two Captcha based options do not. I am familiar with administrating user generated websites. Simple Math isn't cutting it anyway, so I have to up the ante. Simple Math in a MediaWiki website could be conquered by the most rudimentary of scripts. I could code one myself in a half hour.
@Subfader: Please try one of the Captcha options if you can / see if they work for your 1.16 setup or not. Thanks.
Do the maintainers watch this page? I can't imagine there being a more important extension in the MediaWiki stable than this one.
@Bachsau: An upgrade on a lark is something I am not yet quite up to. Plus it seems like a backport would be in order.