Just installed the new update on our test site and really disappointed to see that empty dates still return a 404 response code – had really been hoping for a proper resolution to this one :-/
Hi, Neil. I’m definitely disappointed to hear that you’re still experiencing this issue.
Assuming you have Day View enabled, it should just show a NO EVENTS TODAY type message, like this one I just grabbed from our test site: http://d.pr/i/7N7b
Have you tried clearing your browser cache? Sometimes that can be part of the problem.
One other thing you might try is flushing your permalinks (by navigating to the permalinks page in your Dashboard). That can also be part of the issue.