So, I received this when kicking up Whonix Gateway 9.6:
OS is Linux Mint 64 bit, running VirtualBox 4.3. Verified both my VirtualBox and Whonix downloaded correctly. Only modification made to the default gateway import was to set 256MB RAM to get the command line version instead of a desktop. Tried doing it without changing RAM to no effect. Nothing obviously wrong anywhere else that I can think of either.