Things like Tauren melee reach being bigger, which is something I experienced going away live during Black Temple Illidan progression (at least for that particular encounter), is confusing to players as it's a significant advantage over other races in some instances. No quest tracking is another apparently confusing issue, as many Mankirk's WIfe seekers well know, and there's a whole lot more where that came from:
Simply playing the auction house can be the most lucrative gold making ventures if you have a sizable gold staff and you're not afraid to spend it. Just like a real world stock market, prices of items traded on the Auction House fluctuate daily, creating opportunities to buy low and sell high. Zygor's Gold and Auctions guide finds items that are selling at record lows for you to buy them out!
Learned this today: posted a comment, came back later to see if there was any feedback, reloaded the page: the page posted a copy of my comment. That was not what I wanted. I just wanted to check if my comment was posted and if there were some responses. I did not want to post a copy of my comment from 5 hours ago. And, a humble guess, I think the majority of the users are not expecting such behavior either.