Apple Lion OS X 10.7.3 Update Wifi As soon as I restarted the system after installing the 10.7.3 update, my wifi stopped working. It wouldn't connect. It would get a private ip assigned to it. 

So, I switched on and off the wifi, changed the network settings several times by removing the wifi and adding it again, restarted the system, and when all of these didn't help, I phoned Apple support. After asking me to fiddle with the router, computer and several other things, he accepted that the new update was having issues. And I needed to roll back to the old version. Has anyone run into the same problem? Is there anyway to fix this?
Many times the Combo Update will resolve problems.  Download that update (on another system if you have to) and install it, then restart. I have not seen generalized WiFi issues after the 10.7.3 update, so it is very likely the combo update will help.