With a clean installation of 4.0.1 or 4.0.3 I can not create content classes with more than 22 attributes. After adding the 23rd attr the form doesn't give a confirmation of saving anymore and I cant get out of the form without using the addressbar of my browser. When pressing the apply, ok or cancel button the form keeps on coming back with no changes whatsoever.

I've seen this problem on the forums before but nobody seems to know where te problem comes from. The debug gives this error:

Undefined offset:  23 in /var/www/vhosts/wman001.nl/httpdocs/lib/ezutils/classes/ezhttppersistence.php on line 98

Steps to reproduce

• Manually install 4.0.1. or 4.0.3
• Add a new content class or edit existing content class
• Add attributes
• Add 23rd attribute --> results in error
• Can't ok form
• Can't apply form
• Can't cancel form
• Retype url in address bar of browser to return to any part of the admin interface