Hi and thanks for the support Gothi[c].
Blowssi was the first script I installed so it is unlikely that other scripts interfere.
I got the xchat plugin from here.
But this problem also occurs with the original mircryption for mIRC.
It doesn't work in the querys for me. No problem with the channel decryption.
But since you couldn't repoduce the error i think the problem will be something else. (Maybe it is in front of the screen )