Comment 2 for bug 785581

It’s looks like something under the control of empathy instructs the window manager to extend the history window (when open) a couple of pixels to the right, and then again, and again, and again... step by step.

The window grows even larger then the screen. – If I instruct the window manager (in my case metacity) to go full-screen on that window, it somehow loses control over the window, and it loses it’s standard window frame, without going full-screen and still growing to the right.

The history window is still responsive (e.g. clicking on things you can get hold of while the window is growing larger than the screen), and can be closed (e.g. via window manger). – Once closed you can restart the game by opening it again via Contact -> Previous Conversations.