Which bug fixes do you consider indispensable?

After fighting with it for days, I think I've finally ironed out all the wrinkles. Basically event patches don't like to play nice with other event patches, resulting in freezes, quit-to-titles, scrambles, and spontaneous Blitz learning.

So I grabbed the hex from address 0-C3:FFFF to get all the battle-fixes out of C.V.'s collection and made that into a new patch. Seems to be working out well so far: the Figaro basement is no longer locking itself and Cyan didn't reset the game when rushing out to the Imperial Base.