[toast0]

I've got a test suite [1] for another issue that might be somewhat helpful. It does probing for path MTU issues; server -> client probing may all happen on a single connection if everything goes well, but client -> server probing is one connection per probe, so that might be enough to trigger some issues; although the probe size search uses some shortcuts to reduce the number of probes.

Anyway, if you see anything unusual in the testing, maybe we can get some pcaps and see if anything stands out. Of course, getting that information up the chain to someone at ATT who can fix it, would be up to you :)

(email in profile if you see anything useful)

[1] http://pmtud.enslaves.us/