Captcha Addon not working correctly with a popup comment

[posefius]

I'm trying to use the captcha addon because the SPAM attacks are terrible. But the addon doesn't work correctly with a popup comment. The first time you enter the captcha you get an error message:

"looks like you are a robot, if not please try again and enter the correct code try again".

You are redirected back to the comment input form and then the new entered captcha code is accepted. Does anyone has a solution for this problem?

I'm using Pixelpost 1.5 rc1