Hoping you all can help. Some commenters on my blog - but not all - encounter a 404 error after they submit a comment, and the comment never goes through.
Certain commenters are redirected to this page after they click submit: http://www.mysouthborough.com/wp-comments-post.php (If you click the link you'll see the page is blank, but commenters report they get my standard 404 error page.)
This is affecting only some commenters, not all. I can't discern a pattern as to which commenters it's happening to, and I'm not able to reproduce it. But I've heard it from several different commenters now, so I don't believe it's a client-side problem.
I haven't made any changes to the blog recently. No new plugins. I actually haven't even upgraded my plugins in a while (oops), so no code changes there.
Any thoughts on what might be happening?
Thanks in advance!