After virgin installs of Mavericks 10.9 13A603, Parllels 9.0.23350 r 941886, and win8.1 as a guest, I'm getting consistent system crashes when waking the host from sleep. In normal usage, I let OSX sleep after 10 minutes of idle time. Upon wake from sleep on the OSX side, I can log into OSX, but as the system starts to wake up processes, I get a gray screen crash. The problem details from OSX state it's a kernel panic with last loaded kext of com.parallels.filesystems.prlufs. I'm trying to isolate if having a USB thumb drive mounted before the system sleeps is a cause of the system crash. Any ideas on this one?