According to this site Chrome's current stable version for Linux is 25.0.1364.172 since March 12 (2013). It's the 18th now and I still have version 24.0.1312.52 in my system. I've tried:
sudo apt-get upgrade google-chrome-stable
but it says there's nothing to upgrade. What's the deal here?

sudo apt-get updatebefore? – TIIUNDER Mar 19 at 18:02