To anyone having this issue: Crashing and rebooting after entering sleep (generally seems to be rMBP's and Mavericks)
Please confirm what mac your seeing this on. The iMac report above sounds like an interily different problem in spite of claiming it being the "exact same issue".. This isn't the computer spontanously restarting while being used, nor while powered off. It is solely restarting while sleeping.
It seems only late 2013 rMBPs, but I'm guessing it might be all powernap capable computers.
If you experincing this problem, take a momment to confirm which USB devices are triggering it.
I've never seen this happen with no USB devices connected. I'm pretty sure it's only with USB hard drives connected (both a WD MyBook Studio II and a Seagate Freeagent). My USB wireless keyboard/mouse receiver doesn't seem to cause the problem but I want ot test that plugged directly into the mac, not my external monitor with usb hub, but I'm confirming the USB receiver doesn't trigger it now.