Upgrade 1.1.8 >> 2.0 RC1: Can't register anymore!

[Norbert]

If you want to register in my forum, you get the message.

Wrong value type sent to the database. Array of integers expected. (comment_ids)

This is the message of the admin's error log:

Gast           
Art des Fehlers: Kritisch
http://www.dewender.de/forum/index.php?action=register
Wrong value type sent to the database. Array of integers expected. (comment_ids)
Function: create_control_verification
Datei: /var/www/web46/html/forum/Sources/Subs-Editor.php
Zeile: 1544

[Norbert]

Problem is the Anti-Spam Verification:

Default of the board is question "1". But I didn't want a additional question. I did now "0". Now it works.