I've also had a lot of spam (that'd be about 40 comments in an eight-hour period) sneak through my Askimet filter of later, most if not all of it going to this post (I disallowed comments to that post now). I verified that the Askiment plugin is activated. The problem just started occurring a few days ago.
In a possibly related issue, Google is saying that my website "may be compromised."
Any idea how I can stop the spam onslaught? Thanks!