This is a great extension. I am in the process of moving a site to a new server and instead of moving files, I've opted for a clean J 1.5.14 installation with a known clean template.

After installing the v 4.0 Beta 2, I received the "Request Failed" regardless of what I enabled or disabled in the backend. I then completely removed it and used the Beta 1 version and everything works perfectly.

It looks like there are a lot of these errors on the forum and they are somewhat inconsistent as to what is triggering them. My first thought was that it might have been another Ajax application but that proved to be false. All I can tell you for sure is that there is definitely an
Ajax issue on the Beta 2 and instead of receiving the message that the info will be sent to the moderator, the XML CData is displayed in the text box.

Nonetheless, this is an outstanding extension and deserves 5 stars! Thanks mate!