Trusty-Tahr Alpha Install -- updated today--I seem to be running an older kernel version?

[ZukePrime]

Update.
I think I fixed it by installing the -20 image directly.  uname -a
shows 3.13.0-20-generic #42-Ubuntu SMP Fri Mar 28 09:56:33

I'm just stumped why it happened in the first place.  Would
proprietary Nvidia drivers have something to do with it?  Doesn't it
do some magic with the images/headers?