I came on here because my Ethernet interface stopped working after this update, so another network bug. However, I just fixed my issue by going to /Library/Preferences/SystemConfiguration/ and deleted "preferences.plist" (after making a backup on my desktop). This caused the Network Pane to come up blank and crash if I tried to add any interfaces/services, but when I created a "Location" using the menu at the top middle, my pane reloaded with all my previous settings missing (VPN configurations) but everything functional and a new "preferences.plist" in the afore mentioned folder.