Now.......The Newbb2 was a bear from the very beginning. I ran the upgrade script which I assume updated the tables. Setting the XOOPS permissions was not enough to set forum permissions (I had to delve deep into the module for that).
I tried again today and managed to post and the post never showed up in the forum. When I tried to post again I got the error I mentioned in my first post.
So why the error? I'm clueless and more than ready to find out how to go back to the previous version.
Shelia