Someone needs to do a study to figure out what the response time for a Web application has to be to prevent people from double posting comments on weblogs. It’s unfortunate that it’s not easy to make submitting a form, processing the form submission, and returning a response an atomic transaction so that if people resubmit or hit stop, the transaction is aborted.

Either way, my feature request for Movable Type is that a configuration option is provided that enables people to be warned that they’re posting a duplicate comment before their comment is published. It doesn’t seem like it would be hard to do that sort of thing, and it would prevent some of the massive comment duplication that I see on certain weblogs.