Coming from Rails 2 land? Upgrading? Do you serialize any objects in ActiveRecord models?
If it’s doesn’t act like a Date or a Time, and isn’t a Hash or an Array, you’re fucked. That’s right. AREL (the new cool kid) will only serialize those object types.
A fact which is mentioned in exactly one place, the code itself.
Thanks, Rails 3, thanks a fucking lot.
At least it was an actual bug, and it’s fixed now.