Cygwin and X regressions
Previously, I said that Cygwin was so much easier than the Mac (at least, as far as Macintosh Tcl/Tk went).
I updated my Cygwin install, and inadvertently picked up their new X server code announced in November. I tried the new X installation out with SaVi and Geomview. There's no hardware acceleration yet, but Geomview finally builds with just configure and make; no command-line nudges needed.
Geomview runs for about thirty seconds before the X server dies and takes everything with it. I've watched the X server exhaust resources so that I can't even pull down a menu in a Windows program. Having a slightly easier build environment does not compensate for the loss of a robust and reliable working environment (and an X server that had hardware acceleration, to boot).
Previously, Cygwin was so much easier than a Mac.