VBoxManage errors at boot

[Thomas Hoffmann]

I'm running emulators/virtualbox-ose-4.3.8 on -CURRENT r263411 amd64. The
last several boot sequences I have noticed the following errors in the
console log:

Mar 19 22:11:01 tortoise kernel: VBoxManage: error: Failed to create the
VirtualBox object!
Mar 19 22:11:01 tortoise kernel: VBoxManage: error: Code NS_ERROR_ABORT
(0x80004004) - Operation aborted (extended info not available)
Mar 19 22:11:01 tortoise kernel: VBoxManage: error: Most likely, the
VirtualBox COM server is not running or failed to start.

I'm perplexed by these messages because I do not have any cron jobs that
invoke VBoxManage @reboot for any purpose whatsoever be it managing or
starting a virtual machine.

I'm thinking these messages appeared after the upgrade to 4.3.8, but I
cannot be certain.

Can anyone provide a context for these errors?

-Tom