tinyproxy not compiled with transparent-proxy flag
When using tinyproxy as a transparent proxy, you get the following:
The following error has occured: Unknown URL type
According to https://bugs.launchpad.net/ubuntu/+source/tinyproxy/+bug/42598
its because —enable-transparent-proxy has not been specified in the build
(from redmine: issue id 125, created on 2009-08-09, closed on 2009-08-09)