When using socket.io.js from 1.0.x, no connection can be established.
The client is trying to make connections to
Which are all 404. So I guess this is part of the new protocol that is not compatible. I don't know whether 1.0.x intends to be incompatible with the old protocol, or whether it is failing the to the CORS error (which makes it impossible for it to see that it is a 404).