Password reset lets you enter 10 spaces for a password, but the Login form will reject it. I was going to mark this down as "required: - classes: - nonspaces", but... eh, I forgot, and it's more like a bug in the login frontend JS. (The native apps probably handle it correctly, so whatever.)
Registration has a yes-or-no dropdown for "Do you have an iOS or Android device?"
Stray observations: