athena duplicate messages issue

I had been having problems with the "athena transport received duplicate
messages" error.  Most of the time it has been harmless message but in some
instances it causes everything to lock-up.  So after a bit of investigation
I see that it is caused by the following sequence:
- server invokes callRemote to run a javascript method in the client
- athena.js in client sends back a response to the server for every
callRemote
- but the responses that get sent back (client to server) are not cleaned up
(in the client) so they linger for the next wave of server callRemote and
client send response

A fix for this was to add the following line after "var outgoingMessages =
self.messages;"
    self.messages = [];
This is in function flushMessages in athena.js.  The result is that outgoing
messages which are flushed are discarded and not kept, which seems to be the
goal anyway.

I'm not sure of the complete ramifications here but everything is now
working cleanly for me.  That is, when the server code issues one or more
callRemotes, then the browser code acknowledges each with one and only one
response.  So passing this along for the group.  Does anyone have any
insights into the problem ("duplicate messages") and/or the fix ("messages =
[]")?

Regards,
-Mike