Sometimes I get a broken background in Chrome. I do not get this error with any other browser.
This is the simple CSS line responsible for the background color of b
IF you're still having trouble, you may try switching 'top' to 'bottom' in chromeFix above, and also a div rather than a span
style:
#chromeFix { display: block; position: absolute; width: 1px; height: 100%; bottom: 0px; left: 0px; }