[wlug] OpenOffice Writer's word count...

Does anyone have any idea of how Writer counts words? I'm working on my 50,000-word novel for NaNoWriMo, and I've noticed that the more I write, the more optimistic Writer's word count is. The official word count is currently 10,106. Writer's count is 10,361. Microsoft Word 2007's count is about 10,096, which makes it far more accurate than Writer. It's a bit annoying; if I want an accurate word count, I have to paste it into the NaNoWriMo's word counter. Sandy