Ooh wow, I didn't notice that... I'm running plain Sid....
I commented out the ubuntu part of my apt-proxy config file. I get less
errors, but I still get all the "skipped - no suitable backend"
I then tried purging apt-proxy, and reinstalling it, but it still skips all my packages.
After commenting out the lines for ubuntu (and other software I don't
have) in the new config file, I still have the "no suitable backend"
My system is Sid, running Kernel 2.6 (386), with a ReiserFS filesystem.