Ubuntu 12.04 in VirtualBox 4.2.* on Windows 7

I updated my VirtualBox to 4.2.2. I previously updated Ubuntu to 12.04. Everything is working fine.

My only problem is VirtualBox Guest Additions. I updated it, I think. Or did I? How would I check?
At “how to check version of virtualbox guest additions currently installed…” one of the posts suggests:

lsmod | grep -io vboxguest | xargs modinfo | grep -iw version
version: 4.1.12_Ubuntu

Since I rarely deal with VB installs I never remember the ‘additions’ process.

Update
Oops! You have to install the guest additions in the client Linux OS. After I did this, the VB menu, Machine -> Session Information -> runtime: Guest Additions 4.2.2 r8194.
28 Oct 2012: Updated to VirtualBox 4.2.4 r81684

And the command shows the same:

jbetancourt@jb-vb-acer:~$ lsmod | grep -io vboxguest | xargs modinfo | grep -iw version
version:        4.2.2

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