I enabled the SPELLECHECK button as the last button on all of the textboxes. You will probably need to force-reload (hold down control and press F5) to see the button.
Click on the button, and it should prompt you to download ieSpell. I already have it installed, so it just brings up the Check Spelling box. It's pretty cool, it helps my seplling. Obviously though I'm too lazy to use it half the time.
Hopefully it'll help those who take time to compose their writing ...