When closing a terminal window the frame refuses to go away. When closing Firefox, window shrinks and both original and shrunk version stays on-screen after the program itself is closed. After having selected launcher, overlaid ghost copies of the icons remain after Launcher has gone into hiding. Thus there is a failure to clean up. -- What component should be reinstalled/done. Ubuntu 13.10 on a 86/Dell. Nvidia graphics.

To reproduce - go into system settings. Ghost of menu persists with system settings still highlighted. Click close, and both window + ghost copy offset by 4 or 5 pixels remain on-screen.