One possibility of the grey bar problem might be related to the CSS code. The code looks completely wrong for the "background-image". It has it set as "background-image: ... (repeat-x);" when it should be "background-image: ... (...); background-repeat: repeat;", effectively repeating the image in both Y and X. This would be the standard for W3C. However, Internet Explorer browsers are not W3C compliant, so I would need to write a separate CSS file for each version of IE(6,7,8,9). Basically, the problem is repairable, but time is needed.
When doing this type of work, a lot of time is spent testing the code on several browsers. At this very moment, I only have Firefox, Chrome, Safari, and IE9(with IE8-compat) installed.
Since I have a 1080p TV now, I can test the 1920x1080 resolution, but that takes time too. When I have a chance later I will work on it more. D