When I'm playing audio and the "Library" is shown, window resizing does not work properly. The library pane refuses to change its height if the window is enlarged, and instead the video pane (all black) is enlarged. The only way to resize the library is to drag the separator between video and the library, as this will result in the window itself being resized. With the message log open, the behavior get even more confusing.
version: 0.6.3 from OpenSUSE 10.3