Quicktab problem on the argument of view and block
Looks to be an issue with the quick tabs module. I have the same issue on version 7.x-3.4. It seems to break as soon as you use the % URL variables

UPDATE: After looking at the code, the module calls args(), in my case, the values returned from that are different than the URL. For example, my URL is "product/reading" however, quicktabs gets this Array ( [0] => node [1] => 180 ). So I have to change my view to use the node ID instead of the node title. This should have been noted in the modules documentation.