[Gone GF]

"It really bugs my ass when prissy posters point out the grammatical flaws of others."

It really bugs my ass when somebody calls a spelling error a grammar flaw. ;-)

[dinoparty]

Technically, it could be either a spelling error or a grammar flaw, depending on how you look at it. If you use the wrong word, then I'd call it a grammar flaw; if you use the right word but spell it wrong, then I'd call it a spelling flaw. Either could apply here.

[Xenalyte]

"Grammar" comprises spelling, punctuation, and usage. It's not just parts of speech.

[JavaTheHutt]

It really bugs my ass when somebody calls a spelling error a grammar flaw. ;-)

It really bugs my ass two. :)
Yes, the use of 'two' was intentional.