Not sure if this is repeatable but I'll find out tomorrow when I fly again. But this afternoon, after upgrading and then flying a bit, I exited the arena and tried to exit the game. Upon pressing "quit" on the notepad, my PC froze. ctl-alt-del didn't work....nothing did. I had to do a hard reboot with my reset button on the PC.
Take it with a grain of salt as I've been online twice in AH, once a couple of days ago, and once today.
