I installed Tor & Polipo via the Software Center. I followed instructions found at this question (but since the config file was 404, I used a config from Tor + Polipo 5 Minute Install Guide Ubuntu 11.10).
Tor & Polipo are working properly. I set my network to manual proxy & added the 127.0.0.1:8118 for all but socks (which is 9050). Those are the ports set in the Polipo config file. Still, neither Google Chrome nor Firefox are using Tor when I browse.
I expected to have this working in 5 minutes but it's been over an hour. I'm very confused -- What am I missing???