I just found out about this in my e-mail. This item is sold at Nashbar. Apparently there is a problem with the mounting hardware, it's not strong enough to hold up, and racks have fallen off the wall. It would be a shame for someone's bike to hit the floor from this. It says to contact Delta and they will send extra hardware. This is the rack.
http://www.deltacycle.com/product.php?g=55