Hi,

I currently ran into the same problem. Since a look at the code showed no sign of outputing supportedConnectionTypes and I could not read any response here in the list. I decided to insert it myself.
All I did, was to patch the init-function to set the additional propperty in cometd.js

Here comes the small code fragment:

props.supportedConnectionTypes = new Array();
for(var i = 0; i < this.connectionTypes.pairs.length; i++) {
props.supportedConnectionTypes[i] = this.connectionTypes.pairs[i][0];
}

Dont know if my dojo-code has the correct dojo-mojo, but it does the job and now the cometd client is fully spec compilant ... at least the handshake part :-)

Hope this helps anyone.
Chris