Slip-ups (voicing mistakes) form KNT:
1) Episode 2. Narrator appearance. Koon No Kami is called Inari No Kami. (
details)
_-_3.jpg/180px-Narrator_(episode_2)_-_3.jpg)
2) Nyanki are talking to

. After saying Teyandee!,

looks on the right and says "Sukashii". Then he looks on the left and says "Pururun":

Are there any more similar voicing mistakes?
Not a slip-ups:
1) Episode 13 -

gathered Nyankii for a conversation.

says "shikashi" (however), not "Sukashii" when talking to

