Some days ago I added a new group of user in the Script Editor / Users section, and several thing (like on dialog/sclick some on text on connect and other events) stopped to work. What I added is something like
Now I've noticed that the last commented lines (;mychanops:*) is the cause of everything, now that I removed it starts to work again. I don't know if this is a bug, try to add a commented line at the end of Users list and let me know if it works for you.
I'm on mIRC v6.21 on Windows XP Professional SP2.