I've just noticed that I have significantly less posts too. Think I've lost somewhere in the region of 3-400. Last night I had over 2000, which gave me 3-400 more. It was as if the anything goes posts had all been included in the total for some strange reason.
I did a total tidy up of the database yesterday and the system re-calculated everybody's post counts to be the total of all posts except anything goes and petz.