I've done a few updates to reports in the new bugzilla, and have received the following message a couple times:

You submitted changes to process_bug.cgi with an invalid token, which may indicate that someone tried to abuse you, for instance by making you click on a URL which redirected you here without your consent. 
Are you sure you want to commit these changes? 

By pressing "Yes, confirm", my updates were saved, sometimes after seeing the message again. One or two similar reports seen on the opensuse mailing list.