Fresh installation of Pinstripe (previous betas too) do not power off my ATX machine although RH 6.2 did the job correctly.
If you invoke 'halt' directly, it won't. This is a feature added; there were complaints that it always powered off, even when you didn't tell it to. You can invoke 'poweroff' to do this. How are you invoking the shutdown?
Yep. I invoked it as 'halt'. So this is not a bug, sorry.
That's OK; it is a change in behavior from the previous release...