comms tools in tcl7.5/tk4.1 rather than the crufty old tcl7.3/tk3.6/tclDP.
It can still be (I think) configured to use the older libraries, but I
dont want to install them to test it. :-]
(zircon-1.17p4 is in beta at the moment, and was last changed within the
last day or so, this (1.17p3) is the most recent non-beta version)