[2008.12] ssh instability

[Robin Paulson]

i'm having a lot of problems with my ssh connection over usb - it
usually takes several attempts to connect, and
will hang mid-way through operations very often

sometimes un-plugging and re-plugging usb will sort it, sometimes
leaving it for a minute or two, or suspending and resuming. sometimes
it takes a reboot

is this a known problem with the release, or more likely some specific
problem here? it worked great with 2008.9, i never had a single
problem

thanks