Here's a keyboard layout to fix the `/~ key if it types the paragraph and plusMinus sign. Download [url=http://www.codza.com/files/AcerAspireOneD250US.keylayout]AcerAspireOneD250US.keylayout[/url]. Save it in [b]/Library/Keyboard Layouts[/b]. Reboot. Go to [b]System Preferences/International/Input Menu[/b] and select [b]AcerAspireOne D250 US[/b]. Your ` key should work correctly now.