"when i start empathy, i enter automatically my favorite rooms. When i minimize the room-window during the process of entering new rooms(i have about 10 rooms), a new window will be opened.
eg one room is already entered, then i press the minimize-button of the window, the next rooms will be in an new window. I can do this after every room and the i have 10 different windows opened.

To reproduce the bug, do (in Maverick):
1) Add some (about 5) favourite irc channels to your favourite list and enable the auto-connect checkbox for every channel
2) stop empathy
3) start empathy. a window with the first channel should be open
4) minimize this window
5) now the next channel(room) should open i a new window"

originally reported at: https://bugs.launchpad.net/ubuntu/+source/empathy/+bug/610010