I'm working in 1.3.7, and installed dual pricing, without any problem that I can tell. I did get a few errors in function_prices.php that I had to comment out (it was already doing things like getting prices, etc in another file).

I can assign wholesale bands to customers, and I've assigned wholesale pricing to the products, however the customers aren't seeing the wholesale pricing, even though they are assigned the correct band (1) and are approved.

it does say next to my categories (I SHOULD use zen_get_discount_calc).

any ideas? making me nutty.