Version 4.1.2

system/Helpers/Form/Captcha.php

@@ -100,6 +100,7 @@ class _Captcha extends FormAbstract
 			/* If we previously did an AJAX validate which is still valid, return true */
 			if ( isset( $_SESSION[ 'captcha-val-' . $this->name ] ) and $_SESSION[ 'captcha-val-' . $this->name ] > ( time() - 60 ) )
 			{
+				unset( $_SESSION[ 'captcha-val-' . $this->name ] );
 				return TRUE;
 			}
 			/* Otherwise, check with service */