I've downloaded and installed an updates script which all works fine until a visitor tries to comment. When the "Post Comment" button is clicked the window moves up to a link in the page instead of posting the comment. Very rarely a comment can be posted once, but the same person can't post another. I've downloaded and installed the script several times to check there wasn't something I had done but the problem is still the same. I'm using the script here and if anyone can help I'd be really grateful.