NO, it's books as written, period. I'm just saying that what's happened already is history, and we won't be re-writing it.So it is books as written plus July update?
I can really understand you move, BTW.
If it's in the published books, It's available.Not promising here I wouldn't get original Hide Expertise on a later level then...
You can argue that only 50% of the erratas made sense anyway. I liked the good old days with houserules and not bi-monthly 'updates'.
No!!!While I certainly understand your position, it does present me with a problem - I'm not really good with the 4E rules, don't have the books and can't afford to buy them, haven't read the books and don't really have time to do so . . .
I rely heavily on the Character Builder and Compendium, which are both updated monthly - and these updates incorporate the errata. SO . . . much as I like Aimhirghin and sympathetic as I am with your ruling I can't see any way to keep my character 'legal' for your game and will regretfully have to drop out.
You don't have to go. I have the books and will be more than happy to give you an assist when level-up time comes. And I really don't imagine that there will be many drastic differences between the book rules and CB/Compendium. You might just have to learn to trust your DM, though, and I know that's something of a stretch for you.... 

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.