Ugh, I just installed KSP 1.1 with it being fully released and opening a test save, I find this bug. My KSC is completely black, as I scroll through the blackness I can find and enter the various buildings, with the side bar buttons also working. Note, it isn't nighttime, there's nothing. I'll upload a screenshot in a second.
Output log-
https://drive.google.com/file/d/0B0GVLJwOLVGyRlYzejV5YzhaaEE/view?usp=sharing