No problem at all... I really need to add it into my documentation (it is a fairly recent change, but not recent enough that I have any excuse to not have it in my documentation).

Let me know if there is anything else I can do to assist.  I'm still going to look into the subnetting, I think that would be a very nice addition.

Moving through the code line by line I identified the problem -- it wasn't checking the actual IP address into the range (I don't know how I never caught that before), but it was trying to parse the entire range into an IP address and check that against itself.

I have patched it and will be releasing the patch to SnowCovered shortly (and email to you directly as well). 

Thanks for the catch, and I apologize for that.