If I enter fullscreen while the playlist window is open, then exit fullscreen, the playlist window is not visible, and it cannot be opened again without restarting umplayer. The debug info in the console appears normal and says it is opening/closing playlist, but it does not appear. I have attached the log, although it appears normal.
Linux 3.8.6-1-ARCH x86_64
Debug: This is UMPlayer v. 0.97 running on Linux
Debug: Compiled with Qt v. 4.8.4, using 4.8.4