Major improvements in the security of the CAPTCHA system (no SQL injection or anything like that); fixed denied form submission due to _af_acting on form object wrongly switched to true

.mceItemFlash {
	border: 1px dotted #cc0000;
	background-image: url('../images/flash.gif');
	background-position: center;
	background-repeat: no-repeat;
	background-color: #ffffcc;
}