1 is pretty old, started with 0.11 if you leave the equipment window open for a while the game will bug with a call to nil error and you can use the console to cheat easily.
2 is more of a menu glitch on the equip menu, swapping characters will usually pop up the tattoo button and you can only tattoo that character, if you try changing to another the tattoo window will close but you can just redo the glitch ez

i have no idea what is the 3rd one, a issue that is still unfixed is that lock personality checkbox is gone