Dead white page.
I reverted the database back to a point before the 2.2 upgrade script made changes, and disabled the vbGallery 2.0 item in the Product Manager.
So that's where I stand at the moment. 2.2 files on the server. Upgrade script that returns the error above when run. Database either 2.0, or something below 2.0 with missing fields even though 2.0 was the last installation.