Hee. That's why I love the "add to dictionary" option. There's a lot of words that I use for work that's not in normal dictionaries, even computer ones. Such as DSL.
Misused homophones do annoy me at times, like the where/were, its/it's, and there/their/they're. I did see an amusing one today, made more amusing by the response. This started off as a facetious (love that word, aeiou) response to an article against Halloween.
Original comment: It is people Like you that had good people like me burned at the steak because you do not understand us.
Response: Do witches come with A-1 Sauce now? Cause that would be fantastic.
Online, I'm a bit more lenient. Certain word usages make me go o_O, like a comment from my mom, "keep thinking its friday and i have the day off ..but agast its only thursday and work bah!!!!" I was a good daughter and didn't suggest alas would be better than aghast.
Written word typos annoy the heck out of me. I read a book once that had so many typos that I was tempted to apply for a copy-editing job with the publishing company. A friend has warned me about the typos in the latest Wheel of Time book, so I'm going to have to try to get past those.
