I find the Autocorrect feature very annoying. Especially the annoying auto-capitalization thing, which prevents me from writing a single lowercase letter. All these years of wrestling with office are now over!

• OpenOffice 2.4 (maybe 3.x as well): Tools -> Autocorrect -> Options tab
• Office 2007: Round office button on top -> Word options -> Proofing -> Autocorrect options -> Autocorrect tab

Huh! I disabled them all.

I'm still looking for the "Disable all annoying behavior" checkbox..