Heed the warning WP gives you about this plugin not being confirmed for WP 3.4.1.
I took the chance, thinking not a lot would have changed since WP 3.3.2.
How wrong I was!
WP would no longer save categories or custom fields on new posts, and the Crayon plugin lost all its settings as well. Probably a bunch more stuff, but I didn't explore any more.
I ended up reinstalling WP to get everything working again.