GlassJaw said:
Does that make it ok? To be completely honest, I find the "who cares?" attitude to be abhorrent. WotC has gained the reputation of releasing poorly edited products. Just the thought places them under much more scrutiny. It even goes beyond the simple spelling errors and typos. What about incorrect mechanics and 3.0 references? It seems that I'm in the minority on this. :\
I don't know that it's as much a 'who cares' issue as it is a case of priorities. Unlike many other areas (yours and mine included), there isn't any real competition in the D20 RPG marktet, in that there is one 800 lb. gorilla and a bunch of monkeys (no offense to other d20 publishers or simians intended

).
When I'm evaluating software, if there are two products that equally meet my needs, the quality of the written documentation will be a factor (and I kid you not, to me it is an important factor). The quality of the written docs is a reflection of the company's commitment to putting out good software and providing good technical support.
But given the nature of the d20 market, having a choice between a WotC product and a third-party product of the same scope and support is unusual. Having
Frost and Fur and
Frostburn released nearly simultaneously is exceptional; more often an impending WotC release would scare potential competitors away for a while. And there is no competition for IP products like FR sourcebooks, etc. If you've made a commitment to Forgotten Realms, you've got one source of material.
I think most ENWorlder's are more discriminating than your average D20 player. But I think most of us, when evaluating a product, would look at ease of integration, utility of crunch, quality of fluff, art, etc. in making a purchasing decision. If two products were roughly equivalent, then grammatical mistakes and such could be a deciding factor. But it is rare to see two products released more or less at the same time covering the same material, and even harder for the consumer to evaluate multiple products in a category.
It annoys the living crap out of me, too, when I see sloppy proofing or rules errors that compromise the utility of a product. But if I want that latest FR book, I have to decide whether that annoyance is more or less important than the other qualities of the book.