I got this error message today when quoting someone in a GQ thread:
*You have selected 1 post that is not part of this thread. Quote this post as well, or deselect this post. *
Huh? I previewed and only the quote I wanted had been selected.
You may have multiquoted sometime in the past. It doesn’t forget that, or at least right away. Choose deselect.
Oh really! What else does “It” not forget, huh? My e-mail? That imaginary slight at “It’s” birthday party? The threeway in Cancun?
Like that’ll work.
I’ll bet “It” doesn’t forget that you typed “It’s” when you meant to type “Its” 
Oh hell *no *It doesn’t. It’s funky like that. And not in a good way.