Long story short:  I bought Demigod the other day and was installing it via impulse when I was reminded that I could install SINS over Impulse as well (because it was already there automatically on the Impulse games page).  After installing demigod I tried installing SINS too and it refused to validate my key.  I played it before, registered before, patched before etc but impulse refuses to let me.

My key shows up as legitimate and registered on my account page as well as in emails regarding my account, I've doubled checked the impulse key is the same as the one in my account and everything matches up.  I'm at a loss.

Edit 1:  Won't activate my newly bought Demigod either.  Maybe just a server problem?

Edit 2:  Ok, Demigod successfully activated, SINS still won't.  Anyone know if this is a collectors edition problem or something?