Late this afternoon, my rep was at 9900-something.
I just peeked in, and the main and meta sites report me at 9713.
I'm less concerned about the number itself than why, unless it's actually just some error. There are no deductions being reported anywhere that I can see, either as downvotes(which would take a lot) or flags(assuming I could see that, and they go in 100 increments anyway). They're just gone for no apparent reason.
Here's a screenshot from the site leagues page, with more or less what I'm expecting to see: