This may seem trivial, but it really gets on my nerves when people say "drows" as the plural form of "drow." Drow is like sheep. One sheep, two sheep, one drow, two drow. One illithid, two illithid.. not two illithids.
Sorry for being self-righteous, but it's just a bit irritating to see "drows" over and over and over and over and over and OVER AND OVER again..

it is kinda trivial but yes it is annoying, like yesterday i finished the 5th book of a series and for the first time read the about the author and thsi is what it said.
'...has wrote three other books:TrollSlayer, SkavenSlayer, DaemonSlayer and DragonSlayer'
im sure thats 4 books innit? i think its just a typo but to us perfectionist it is annoying ;)
Felix

And here's one I forgot.. I cast Fireball on every Keebler truck I see because they claim their cookies have "Elfin magic baked into every one." ::deep, cleansing breaths:: It's ELVEN, you morons! GET IT THROUGH YOUR SKULLS! ELVEN! AND ELVES ARE NOT TWO INCHES TALL! MOST OF US ARE ONLY SLIGHTLY SHORTER THAN HUMANS! Honestly. THAT is the one that infuriates me the most.. Elfin. Pfeh.. I got your "Elfin magic" right here, buddy..

Hear, hear with the "no plural form" of Drow. It's the same with Samurai & Ninja, if memory serves.....

Felix, what would bug ME about those books it not their "New Math" of not being able to tell 3 from 4, but the utter stupidity of the names. I have seen worse, though: I've seen a boxed-fruit-juice drink called "Juicy Juice" and one of those stupid Goosebumps books entitled "The Thing that Ate People."

Actually, Illumina, the use of "elfin" is correct.
elven: From, of, or related to elves.
elfin: Unusually small and delicate.
Of course, the Keebler Elves aren't what intelligent rational people (who play D&D games all day and bicker about Elves) would consider Elves: They're more like pixies, or garden gnomes. But I guess "Keebler Gnomes" evokes images of less-than-spotless working conditions, and "Keebler Pixies" just sounds gay.