sim_hardware inverted input pins do not exist?

I used the StepConf wizard to set things up, and it all worked right up until I tried to invert an input for a home switch.

As soon as I inverted an input in the StepConf wizard, I get the following error when I try and start LinuxCNC 2.7.3:

sim_hardware.hal:29: Pin 'parport.0.pin-10-in-not-fake' does not exist

I'm using the 2.7 ISO image I downloaded a few days ago, I don't know the exact version of the StepConf wizard, but it is whatever was shipped with that ISO image.

Anybody seen this before and know the magic solution?
Thanks,
Jay

there is a fix for this when 2.7.4 is released.
If running real hardware this should not be a problem.

Chris M