I have eliminated the usage of the grey background by the use of an image and use a fix color. This should resolve the issue for a browser which has some terrible difficulties to detect there is a new version of an image on the server, makes it a little bit faster to access the page, and allow you to change the background color if you wish by clicking on Settings and accessing the Colors section with the use of "Background color".

So, if you wish to bypass the default color, you may use that option.

The default color is EEEEEE. That is pretty much as close as possible to what we had before as an image approach. If you do not have this default color, you can either force a right click refresh to get the new stylesheet or simply adjust it manually in the setting I just mentioned.