Yesterday I spent my whole fucking day solving a bug from a Drupal multistep form, the kind of bugs you know it worked for a year then suddenly start to go full retard and simply not working at all

Took me half a day to get how it worked, half the rest to get why it stopped working and how to to make it work again, knowing that the "old fashion way" can't be applied anymore for dumb reasons (unless the client wants his user and payment history tables to be dropped, which I doubt)

I don't know if my solution is the best, but it works without too much tweaks, and hey, it still works today!!