I've looked around for the ability to turn off supernode on Linux and Mac clients for a while but have come up empty. Do you know which section of the preferences/settings it's supposed to be in?
Well barring effective virtualization, booting into Windows disables supernode functionality on Windows and MacOSX in the same sense that a brownout does
https://www.cs.uwaterloo.ca/twiki/view/CF/SkypeConfiguration...