^Yes! Urameshi's been quiet so long I almost forgot he used to be here...wait, make that Urameshi-sama. Haha.
Actually that's a good point masterrabit, would Killerbee get hurt by his own black shroud form? When it comes to Naruto it seems that the Kyuubi's so evil and malicious that its chakra is equally bad...so it hurts Naruto. The Hachibi doesn't seem so evil but then again we wouldn't know - it could've still been bad before it was sealed. It doesn't seem as predisposed to being malicious - or maybe you could say it has a sense of humour. Either way, I can't say for sure if that has anything to do with his chakra shroud appearing to not hurt Killerbee. Possibly it requires control over the chakra to avoid any damage.