[Theme: raindrops] Ugly White Borders

Hi, Raindrops is an awesome theme and I have been using it without issue for a while now. However my site has suddenly developed white borders half way down the page and the footer. I have tried all the Raindrop setting but can not reset it as before. I am using dark theme. My site is:. Please can you help.

http://ww.wp.xz.cn/extend/themes/raindrops/