Though I was reading it through the paper backwards, I could make out "NO FIREARMS", followed by what appeared to be the English and Spanish 30.06 wording. For someone who tried so hard, they still got it wrong. I guess I shouldn't be surprised.
I was startled, but decided not to get up and go to my car to disarm. Even from where I was sitting I could tell that the letters were far from the appropriate height. It all fit on a 8.5 x 11 inch sheet of paper; there was no way that sign was legal. Plus, how on earth did I miss that before walking in the building? I wasn't distracted and would certainly have noticed that new sign, right? There had to have been something that made it difficult to see the sign.
On my way out I tried to take a photo with my cell phone. You can't even SEE the sign from the outside. The windows are so tinted that you have to get about 6 inches away from the glass to even see it. I snapped the photo and got out of there fast in case the clerks noticed my "suspicious" behavior, of course. And I bet the lady sitting directly behind the sign was a little creeped out.

As you can see, you can't even see the sign unless my reflection is over it!
So, now I'm torn. Should I call them up and rip them a new one over it (neglecting, of course, to mention that their sign isn't even legally enforceable), or should I just keep quiet and continue to carry there?
I think I'm going to keep quiet and continue to carry since the sign is neither clearly visible nor the proper dimensions. It just rubs me the wrong way, and I may print off some of those no gun = no money cards to give to the manager there…but I doubt it will do much good, and might even do harm if they start looking into the proper requirements of the 30.06 sign.