[dssart]

I can't comment accurately on your situation, but I had serious reservations myself in upgrading from 3.6.9 to 3.7.0. I have a custom hack coded for my forum that I was almost positive was going to fail with this CSRF thing. I did the following and it was the smoothest upgrade I've ever had. Not even my custom hack cracked:

Backup database, backup my /images folder, shut down forum, do upgrade. Upload my custom /images and overwrite the new, then perform upgrade. After, go back and revert everything the upgrade reported as needing to be reverted. Sounds to me like some of the upgrade files were munged during the transfer. I'd re-upload the upgrade files and make sure all appropriate ascii files are transferred as ascii and all binary as binary. Something that simple can easily be overlooked. Also, make sure your config.php is correctly configured. Something is missing..you just have to.

Seeing as it was a brand new install, I'd say the problem is either with a corrupt file upload or misconfigured config.php. Something isn't seeing something the way it's supposed to. Many people have installed the 3.7.0 software as an upgrade (which is a helluva lot trickier than a virgin install) and are running with no problem.