KenM said:
I agree, I ran a game in FR once. Some of the players were like "well, its not like that in the FR book". I told them "well, its my game, my world, don't assume everything you read in FR books are right"
Well, it always pays off to be informed, so not to unintentionally rewrite the recent history of Faerûn (say, the last 3000 years or so ;-)).
I know you players' side: I read a lot of FR-novels, and all 3e-Rulebooks (except Serpent Kingdoms, which I am reading at the moment), so I know a good deal more about the Realms than my DM's. Whenever something is handled differently, I want to tell the DM "that's not how it's supposed to run". But of course I don't. After all, it's our world now, and the details aren't that important (especially if they don't have anything to do with the current plot.)
The only time I mention something is when they screw something up big time, but then usually only like "that isn't actually like that" more for the DM's information than as a request to change it.
The only time I was really peed off was in an an AD&D-Group (but I generally didn't like the guys' attitude towards several concepts): I entered the group, and (since it was an evil game set in the FR), I wanted to play the arrogant arcane supremist elf. So of course I chose gold elf as the race. And the following occured:
DM: "You're an elf, right, what sort?"
Me: "Gold elf, of course - I want to play the arrogant bastard after all"
DM: "What elf?"
Me: "Gold elf. You know, the Realms' answer to the grey elf"
DM: "Never heard of them, no, I only use the normal kinds of elves as in the complete book of elves"
Even after I showed them the passage about "Elves in the Forgotten Realms", he just said: "No, I won't have *that*! You're a grey elf" In the tone like: "I won't put up with your garbage". He didn't even consider it. The most annoying thing about it was that he didn't play it *wrong* because he never had the real book, or because he chose to keep the core races instead of using the FR ones. He just never bothered to read something actually titled "Elves in the FR".