I was looking back at one of my posts, and there were smiley faces substituting for the number 8, it seems, in this post (http://fencer.wordpress.com/2007/04/15/browsing-the-rock-encyclopedias/).
I went to the edit page and checked visual and html versions. No sign of anything different happening at those locations.
I haven't checked all of my old posts to see where else this might crop up yet.
Anybody any ideas or experience with this.