I think all PW's have uneven lighting/light bleed at the bottom. You'll probably have to wait for PW2 for an improvement.
I think he means glowing specks / spots, they appear when there's a tiny hole lightguide. My first PW had one at the bottom (http://i.imgur.com/NVzI9.jpg below 'eines') and I exchanged it. The 2nd one was fine and had a far better display (it's almost white at maximum brightness, whereas the first one (with the speck) had a strong yellow tint). Tbh I think the PW displays are kind of mixed bag and you have to get lucky to find a good one (I dont think there are any great ones out there), but I doubt anyone would notice the variations as long as they dont compare it side by side with another PW.