I too could not browse the web through my home wifi after the update. Narrowed it down to DNS resolution problem before coming here because I could browse by IP. I had previously installed/uninstalled vpnc prior to the update, and the above solution worked for me. Thanks. (extras , ahh!!!!!) @DaveQB: I ran through the checks you walked through, and my /etc/dnsmasq.conf was good after the update and didn't need the changes you indicated, so I tried the above solution.
nslookup google.com
nameserver 4.2.2.1