It looks like the hotfix (http://support.microsoft.com/kb/983528) DaveK suggested is working.
It has fully resolved the issue with my Windows 7 machine + our lab Win2K8 box (although we couldn't see the symptoms of the small window size as the latency is so low, we could still see 0 WSF in tcpdump output). We are waiting for a planned outage window to try it on one of our production systems, but we are quite hopeful this should fix the issue. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple