Originally Posted by Mercenary Pen
Bear in mind that open office tends to give a higher word count than the validator on the NaNoWriMo website.
Actually, the deal with Open Office is the auto-correct that turns " into "custom quotes". It counts these quotes as an extra word. So if you disable this feature in autocorrect options, both in the Options tab and the Custom Quotes tab, it will stop doing that and you'll get a much more accurate word count.