User blog comment:BertH/Fluid layout has arrived/@comment-4829508-20131206000737/@comment-8-20131206222133

I've changed the color for that middle split to match the top sky (using ThemeDesiger). The background might need a wider fade at the bottom of the image, but it works okay there anyway, and very well at the top. If you want to change it back, revert of course :)