It's Plan 9 that changes genders every now and then.
Yeah, I had to play with that for the April Fool's thing. It was just too good to pass up.
I'm surprised at how few times the genderjump happens, truth be told.
Then again, there was an exec for ... Proteus I think? Or AG CHemie? A Euro-Corp, at any rate, who was an older guy with some kind of mortal disease. He goes away for a while and his 'neice' suddenly pops up, with his shares of the company. Talk from there seems to indicate that he either had his brain transplanted or simply got a MASSIVE bit of genework to reboot things. Of course, it could also indicate that she killed the old geezer for the loot.