Player NoCollide broken after tonights updates.

After our server updated tonight you can no longer walk though players. Here is the code, can you think of why this would be broken?

[lua]
function GM:ShouldCollide( ent1, ent2 )

if ent1:IsPlayer() and ent2:IsPlayer() then 
	return (ent1:Team() != ent2:Team())
end

return true

end
[/lua]