I have a problem with NSM. I am trying to allow wikipedia.org, and there are a lot of URLs associated with this. One of them is "bits.wikimedia.org". I specifically allow this website. However, NSM blocks it because it is "general", even though I have specifically allowed it.
It seems to me that if I say to block "general", and then allow a specific website in the "general" category, then this specific allowance should override the general category blocking. In fact, NSM used to work this way. The problem with unblocking categories is that "general" covers too many types of things. There are many other examples where specific unblocking is advantageous.