Hi Kelvin,
Did you test it with 1.7.1?
I don't have any site right now at 1.7.1... But looking at the change log between 1.7.1 and 1.7.2, I don't see any reason for it to be not compatible.
This is a very simple plugin using basic function... so I would try it on a 1.7.1 install.
Let me know how it goes.
Mario