Iíve mentioned this before in other topics, but: people who misspell my first name. I have the second most common spelling of it (a more traditional spelling in certain areas). There are popular celebrities with their name spelled the same, so itís not like itís uncommon.
Itís just one extra letter. I understand it happening as a typo once or twice, but there are repeated offenders who have been corrected.
The worst is online. People will respond to me on Facebook and misspell it, two lines under the correct spelling pre-filled by the website. Theyíll do the same in emails, when responding to the one that had my name spelled correctly in the signature (thank goodness my email is my nickname.lastname instead of firstname.lastname, or I can only imagine the problems).
I keep telling myself that I can only correct them so much, Iíve been dealing with this for over 20 years, and I need to adjust how I react to it (that is, stop letting it affect me so much), but there are days like today when it happens so many times that I just have to rant about it.