My home switches are working fine using the default macro behind the home switch:  Z axis homes, then X, then Y.  I'm running the latest version of Mach3
I've modified the code behind the home switch to first home the Z and then home the X and Y at the same time:

DoButton( 24 ) 'Z Home Axis
RefCombination( 3 ) 'X + Y Home

I get the Z but only the X axis homes.  According to the docs, the number you pass into the RefCombination function is based on the X=1, Y=2, Z =4.  I even tried:

RefCombination( 7 ) 'X + Y + Z Home

And once again, the only movement I get is out of the X axis; no Y or Z movement.  

Is the RefCombination() function broken?  Has anyone else had recent success with this?

UPDATE:
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It appears this is a Smooth Stepper bug that is at least two years old...that along with the partially working Backlash compensation is making me think I might shelve the SS until the plugin is fixed.