Yeap, Pioneer makes mistakes on their editted versions of Tenchi Muyo! but we'll forgive 'em, right? Right! Anyway, I can only remember two mistakes and a mistake/something weird by the original animators of Tenchi. Nonetheless, I'm still making this a page that anyone can contribute to! ;) Just send in what you see and I'll post it, gladly giving you credit! ^!^
1) In Tenchi Universe in either the second or third episode...whatever, Ryoko was sitting on the roof and she says, "That damn Ayeka! Always trying to steal MY Tenchi" Or something to that extent! The point is she said "damn" in the Toonami editted version of Tenchi! Special, huh?
2) In the very last episode of Tenchi Universe, No Need for Conclusions, Nagi is still going from space bar to space bar looking for Ryoko and she holds up a picture of Ryoko. What's so special? Ryoko's flipping (flicking)you off in the picture! Again this is the edited version that plays on Toonami.
3) This is an animation mistake, ok so this belongs to the animators not Pioneer, but oh well. ANYWAY, this is in the Mihoshi special and Ryoko flys in on the space ship Ryo-Ohki...but at the same time Ryo-Ohki in her cabbit form is with Sasami. o.O' Then again, this is Mihoshi's tall-tale so it might be on purpose, but just incase! ;)
4) *NEW* This is just a mistake I noticed in Tenchi In Tokyo, it's in the episode The Day We Met I think; Kamidake, Ayeka, and Azaka were searching for Washu and Ryoko...well Kami. and Aza. said searching repeatedly for a while and then said, "we have found organism life signs" (ok, so maybe they did say exactly that but they something that means the same). Why didn't they say humanoid life signs? I mean...on earth are there like organisms EVERYWHERE? Tsk tsk, Kami and Aka said the wrong thing! Oh well...
Am I missing anything? If so, feel free to e-mail me! ^!^