Thunderbolt to Ethernet Adapter doesn't work with Retina MacBook Pro

I can't seem to connect to Ethernet with my Retina MacBook Pro. I bought an adapter and when I plugged it in, the network setup assistant showed that I was connected to the internet but my web browsers (Safari, Firefox and Chrome) couldn't connect, nor could any other programs (like Mail). The error message said that my computer was not connected to the internet, which did not match what Network Diagnositcs said. After a phone call with Apple Support, I had a replacement adapter mailed to me. With the new adapter, my computer now says that it is connected to the internet and I even have an IP address, but programs still can't connect and I get an error message saying the DNS lookup failed. This happens even when I manually enter the DNS server. I have already tried running the Thunderbolt software update 1.2.1 as well as the recent Thunderbolt firmware update, but the installer says they are not compatible with my computer. The problem occurs for both Thunderbolt ports. Is anyone else having this issue? I have no problem connecting to WiFi, so my temporary work around is using internet sharing on my old MacBook, which can connect to the ethernet connection in my apartment with no problems.

Hmm. Well I tried rebooting with wifi off but that didn't fix things for me. Would you mind sharing what your System Information says under Thunderbolt? This is what mine looks like:
MacBook Pro:
Vendor Name:          Apple, Inc.
Device Name:          Macintosh
UID:          0x0001000D1290C120
Firmware Version:          11.1
Port:
Status:          No devices connected
Link Status:          7
Link Controller Firmware Version:          0.11.4
Port:
Status:          Connected
Link Status:          2
Link Controller Firmware Version:          0.11.4
Thunderbolt to Gigabit Ethernet Adapter:
Vendor Name:          Apple, Inc.
Device Name:          Thunderbolt to Gigabit Ethernet Adapter
Vendor ID:          0x1
Device ID:          0x8003
Device Revision:          0x1
UID:          0x000100020059EBB0
Apple Serial Number:          DTN224606LWDWKHAX
Route String:          3
Firmware Version:          5.5
Port:
Status:          Connected
Link Status:          2
Port Micro Firmware Version:          0.0.8

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