Just gonna include some of my favourite Dwarf Fortress patch notes and bugs over the years:
Fixed a bug where animals could rent rooms
Fixed bug with animals picking out clothes to wear
Fixed bug with mules shitting luggage
Cleaned up the bear situation
Babies no longer start strapped with a knife
Fixed problem with undead passing out from strangling
Made the corpses of small animals that die out of water stop teleporting
Made dwarves care if you melt down their masterpieces
Stopped soldiers from going to parties
Added an aperture flag that stops mouths from being gouged out
Fixed bug where all the local rock turned into sky whenever migrant groups were created anywhere in the world
Made semimegabeasts get along better with their cave friends
Fixed a problem with blood hanging in the air
Stopped elves from being pleased with unethical trades
Stopped children and babies from joining you on your adventures
Allowed dwarves to get married
Made thieves and their support groups respect each other
Stopped booze food from melting, even though it probably should
Made dungeon masters happy with their cloaks and boots again
Made all undead respectful of one another
Fixed problem with the king coming early and not actually showing up
Stopped looping dwarves from constantly trying out gloves and boots when they should just pick one and go
Alligators have hair and other unintended attributes
Rain kills everything it lands on
Dwarves given their choice of weapons will choose ones too big to use
Humans in Farming houses are naked
Tigerman does not have ears
Blind cave bears have front toes on both front and rear feet
Magma crabs drown in magma
ALL primates have front and back legs (with accompanying feet), no arms or hands, yet have fingers, somewhere
Undead cat can adopt dwarf
Vampires who have been scouts brag about murders they committed while scouting
Undead dwarf contracted were-chameleon curse
Animal breeding is prevented if animals aren’t “willing to marry”
Frozen in time; no way to re-enter time continuum
Incorrect use of “whom” in elf.txt
Nonlethal fall onto upright spike causes unreasonably high skill gain
Dwarfs refuse to use picks after unforbidding said picks while traders are present with their own picks
Giraffe is trainable for war
All animals are described as “Gigantic”
Last time i played DF there was a known issue where female soldiers would charge into battle with their babies strapped to their chest, and go berserk when their child was inevitably wounded