Yesterday I updated /usr/src for my laptop (using svn). I followed the instructions in Chapters 9 and 24 of the Handbook as carefully as I could to rebuild and install the new user base and kernel. Afterwards, I rebooted and logged in to the system only to find that everything works. I ran 
uname -a
to make sure I was running the new kernel. It shows that I am. I used the system most of the day yesterday and this evening. The network, X11, audio, video, browsers, office suites are all working. Guest OSes are running as expected in VM's. I rebooted it a few times. Everything is working exactly the way it should. What am I doing wrong? 