Invision closing down when command entered

[Khepry]

It seems that there is a little bug in Invision that allows others to close down my irc.
A buddy of mine thaught it was funny to do this to me.
he enters a command,(he didn't tell me what) and my invision just closes down.
He said it's fixed in the newest mIRC.
could anybody help me?
greetz Khepry

[Per-Ole]