Have you ever accidentally necroposted?

I've only done it once on purpose, but I was the one who originally started the topic. I did it because I had found some new information pertaining to the subject. I added the information for those who do a Google search on the subject.

Now I have been guilty of commenting on a post that has been necroposted, only because I didn't realize that they had been until after I added a remark. Now I try very hard to look at the original date of the post to make sure I don't anymore.