The new weekly challenge for zombie headshots makes no mention of which console(PS3 or XBOX360) it is for when logging on from a computer when I enlisted. But the console app says its for PS3 only. Very confusing, should still be able to participate in challenge on XBOX360 and get some clan xp.
Technically they are different challenges that they enter twice. Either way, it is for both as I have it on the xbox and I know others have seen it on the PS3. The app is just having difficulty showing both for some reason.