Most
applications
have Spell Checking turned on by default, but or some reason, Safari does not. Even though Safari is not a word processor or text editor, I still run into times when I type long bits of text into a text field.
Here's how to turn on spell checking in Safari:
Click in a text field.
On the menu bar, go to Edit / Spelling and Grammar / Check Spelling While Typing.
As with Spell Checking in the rest of Mac OS X, misspelled words have a red dashed underline.
Right click
the misspelled word and choose a replacement word in the popup menu.
