Safari won't connect to internet but other browsers will
Firefox and Chrome can connect to the internet but since upgrading to Yosemite, Safari, iTunes and other Apple Apps have an exceedingly difficult time connecting to the internet. (ie server not found) I have to resort to turning off/on my wifi and/or restarting my computer. All other non-Apple applications can access the internet just fine.
MacBook Air, OS X Yosemite (10.10)