[Doubledoom]

OK, here is the script fix:

In showthread_replybox, a whole chunk of code is missing.

You need to add this at the top:

<script language="javascript">
<!--
var postmaxchars = $postmaxchars;
function validate(theform) {
	if (theform.message.value=="") {
		alert("Please complete the message field.");
		return false; }
	if (postmaxchars != 0) {
		if (theform.message.value.length > $postmaxchars) {
			alert("Your message is too long.\n\nReduce your message to $postmaxchars characters.\nIt is currently "+theform.message.value.length+" characters long.");
			return false; }
		else { return true; }
	} else { return true; }
}
function checklength(theform) {
	if (postmaxchars != 0) { message = "\nThe maximum permitted length is $postmaxchars characters."; }
	else { message = ""; }
	alert("Your message is "+theform.message.value.length+" characters long."+message);
}
//-->
</script>

This will stop those with script debug turned on from getting errors on pressing the go button