I've just started running VMPlayer 5.0.2 on a Fedora 19 x64 host with a Windows 7 x64 guest.
About once an hour or so, I'm getting a fatal error that shows up in the host terminal window:
terminate called after throwing an instance of 'cui::NullPointerError'
what(): Null pointer dereference
When this happens, fortunately, the VM suspends itself, and I'm able to restart it without incident.
Still -- very annoying.