chat history impossible to read on active channel

Binary package hint: telepathy-idle

(this bug may belong to some UI layer that is not in telepathy-idle.deb; I don't know Empathy well enough to tell)

Assume an IRC channel I left open overnight, with active conversation through the night. In the morning, I want to read what happened, but the conversation is still ongoing. Every time something happens on the channel, the window scrolls to the end, even if I'm dragging the scrollbar with the mouse. Thus, reading the history becomes really hard..