For the past week or so, every time I restart my rMBP, my desktop background resets to the default Yosemite picture and, more annoyingly, I get logged out of all of the websites that I was logged into. I stay logged into several different forums, Facebook, Flickr and a couple other sites - all active in Yosemite in tabs. Previously, when I restarted my rMBP, I was automatically logged back into those sites. However, something changed over the last couple of weeks (can't say exactly when it started happening). I've been running the developer version of Yosemite 10.10.3, and last updated that on 04/02. I also installed the release version on 04/08. This behavior may have started with either of those updates, or it could have been something completely different. Is anyone else experiencing this issue? Is there a setting somewhere that I missed that would cause this? I've been through the Safari preference screens and don't see anything obvious.