by Alan Robbins.
It just gets better and better.
I thought OK, no problem I'll just delete the offensive module and redo the upgrade from scratch.
The following modules in a bone stock 1.9 refuse to upgrade: exercise, hotpot, journal, lams
And once you've gotten through that, /blocks/admin fails.
And now it just crashed on block/admin_tree
Silly me, but one would think this would all be documented somewhere, and I could simply delete all the stock components that won't upgrade and go on. Think I'll start a moodle support company and charge for this