DNS Resolution not working

[BRM]

I am having severe difficulty with my Kubuntu 13.04 installation whereby the DNS simply will no longer resolve.
I have disabled dnsmasq from NetworkManager to try to fix it, and I have also tried the reconfiguring resolvconf per the below URL.

http://askubuntu.com/questions/137037/networkmanager-not-populating-resolv-conf#172517

Even after several reboots the system fails to resolve DNS names for most applications (nslookup works just fine, but not Firefox, svn, Dolphin, etc).

I'm at wits end trying to figure out where to look next. DNS has been a little flaky for a while - requiring a second time to get it to resolve - but now its outright dead.
As it is my work laptop, I really need to get it working again. (Writing this from my personal tablet.)

Ideas?

Ben

Sent from Yahoo! Mail on Android

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