I've upgraded to NewBB 2 final version but I've noticed in blocks administration that my blocks are listed twice. I believe this was true before the upgrade too. I'm running XOOPS 2.0.7.3.

I installed the new main.php from SourceForge here. It's not clear to me what is supposed to happen next but I still have the double blocks listed in the admin screen. Is there a way to delete the duplicates? Is there something more I'm supposed to do after uploading main.php?

If you are using a cloned template set, just go to the template manager, open the cloned newbb templates, delete the templates. Then you will have an option to regenerate them.

I had a similar problem with the AMS module, but for different reasons. I had duplicate, and triplicat templates due to a bug in the early release of XOOPS 2.0.9. I had to delete and regenerate those templates. But my default templates are duplicate due to the bug.

Anyway HTH.

PS. any problems you can always revert back to the default template set.