I'm rather late to the party on this one, having been away over the weekend, but came here to see what folks thought about the strangeness of only 30 cells needing to be shaded. Having read the thread, it seems most people have ended up thinking that 32 is the way to go. I'm a bit confused as to why folks have reached this conclusion.
From my point of view, we're clearly instructed that "the set of cells that the solvers must shade" is the five letter word in the bottom row of the grid; let's call this word N. This is the only mention of shading in the preamble. For me, that suggests 30.
I know that this gives a mutilated version of the "world" which is indeed strange, but correctness surely arises from following the given instructions rather than guessing what might have been intended. Can anyone convince me that two corners are somehow part of N, or that this is not relevant? In particular, where are we told that we must shade those two? People seem to have made some distinction between "set" and "group", but I still can't see how that instructs one to shade the corners. Nevertheless, the fact that most people seem to have converged towards 32 makes me wonder whether I've missed something.