I thought I'd ask the hivemind about this, because someone must surely either know something about this, or know someone who does.
One of the items coming to public attention with the Templeton fallout is that the regulations permit up to 2.5% harmless coloring/flavoring material in rye whiskey, and still permit the product to be labeled "rye whiskey". (Not "straight rye whiskey", and this exemption does not apply to bourbon at all. Something to do with recognized industry standards, of which bourbon has a solid track but rye doesn't, due to its scarcity of production until fairly recently.)
I have an early bottle of Knob Creek Rye, and while the current bottlings are labeled "straight rye whiskey", this one is not. Every place its type is mentioned, the label just says "rye whiskey". Now I'm curious as to whether this is simply a labeling oversight, or whether Beam doctored the initial batch (legally) to get the product out while it was finding its feet. I do not think the latter is very likely, especially since it's known (or at least presumed) that KC Rye is the same mashbill as OO and JB Rye, but one never knows these days so I figured I'd see if anyone has any light they can shed.