This is just one of my blogs that has lost its background.
I'm not sure what's going on, but I know of at least one other blog I have where this has happened. I don't know if its my fault, or Google's or if I moved something in my Drive account, but I'll try to fix it.
RECTIFIED March 2nd, 2016 (Blogger's fault: Lost the default background image. #SHEESH)