I think perhaps we're talking about two different things here. When I say 'errors,' I mean typos, gramattical errors, omissions, etc., not necessarily 'errors' in design (which are often subjective anyway).
For example, the halving of skill rule. To some here, that's clearly broken, and mathematically just doesn't add up. But that's a design issue and maybe that was the intent. Either way, it's not something that has a clear-cut fix that can be handled immediately, and I wouldn't expect it to be.
On the other hand, if you have a typo wherein you say a shortsword can be set for a charge, okay, fine, that's a mistake. I can forgive that. But I would expect that to be fixed the next time that chunk of text is made public, be it the next hard-copy printing or an SRD.
A manufacturer of hard drives works in electronics, plastic and metal. If his directions are translated poorly, that's one thing, but he better have his electronics and plastic and metal right.
Any book publisher, however, works in words and paragraphs and ideas. If the artwork is off, that's one thing, but he better have his words and paragraphs and ideas right.
As a consumer, I would not buy a book that was never spellchecked and was filled with grammatical errors. I'm surprised to hear that publishers preparing to spend their own company's resources on making a product based off an OGL would have standards that are any less...