Does anyone know what the blue autocorrect stuff is in mail.app? It's different from the dotted red line system wide spellcheck stuff. I can turn that off but the blue thing still happens. It seems to have the same library/logic as the iOS autocorrect (it even gives the same 'click this arrow to not correct' icon). Unlike the red autocorrect which lets you misspell unique works (and it just underlines them) the blue one gobbles up and autocorrects everything. Another weird thing is that it only shows up on my laptop, but not on my desktop (both running the same (latest) version of mountain lion).