Well as the title says my crank falls, technically it unscrews as I close the window. I have two windows with the exact same problem. My mechanic inside of me tells me that maybe its missing a washer or something that retains it.
Since I'm on my mobile device and the URL upload gives me a invalid file message I'm going to give the link to my pictures stored in my Dropbox folder. Hope there isn't a problem by doing so.