Presently running FreeBSD 10.1 release natively with no problems. Trying to experiment with FreeBSD 10.1 stable using Vbox hosted on Win7. Following error is being repeatedly written into log "2015-02-22 10:06:23 "hostname" kernel vboxguest: VBoxGuestFreeBSDIOCtl: bad size 0; pArg=0xfffffe010f863a20 Cmd=3222296069". It appears as if either the ose-additions or VirtualBox is not accetpting the native resolution of my monitor which is 1366x768. The message posted below appears repeatedly in my Xorg log. Right now display is using Gallium pipe and Xrender, so I have no 3d support or openGL visuals. I gather that the shared folder and seamless mode are not working with a FreeBSD guest as well. At least mine are not. I can post a ton of stuff that I've already looked at but I'm hoping this problem is at the easy end of the spectrum and won't require that. Maybe some help with more verbose logging settings might help with finding this.