Version details: 1.0-0ubuntu2
Distribution/Version: Ubuntu Hoary

When playing a video that is too small to fit completely in the window, black
bars are used to pad out the empty space. This area has a tendency to get filled
with "old pixels" e.g. when the Totem drop down menus overlap into this area and
you close them, what's left is the part of the menu that overlapped into the
black bar space. Hopefully my screenshot will do a better job of illustrating this.