I'd change it if anyone, besides you, had mentioned it.
Though, according to wowwiki:
"Hard mode, not to be confused with heroic mode, refers to the increase in difficulty of a raid boss encounter resulting in increased rewards and/or achievements. This is accomplished by doing or not doing certain things that increase the difficulty of the boss fight. You can not set the boss encounter to Hard mode from the user interface."
http://www.wowwiki.com/Hard_modeSo, I may fix it, though I'd still rather not because it came from you. I'm on the fence. Hm.