Am I the schmuck here?

The psychotic printer guy from my previous post sent another email this morning. He claims the logo I sent him is unusable because it's 72 dpi. Here's the image I sent him. It's 300 dpi. Go ahead and download it and open up Photoshop ("the artists' program") and take a look at the resolution. It's 300 dpi, right? In what universe is this image 72 dpi?