What kind of keyboard do you use that has an actual apostrophe on it? Or do you go out of your way to use Markdown (or something) to clean your input before submitting? Just curious...

I'm scared to think, but there might be a Firefox extension that embeds Word into text fields...

there is, its called "its all text". It works for any text editor, actually.

option-shift-] on the Mac does a proper apostrophe.