Since most issues seem to be related to IE, here's what I did:
In casino template casino_index_main, I added this:
Find:
Under add:
HTML Code:
<!-- please use firefox -->
<!--[If IE]>
<div align="center"><h1><font color="red">WARNING!!!</font></h1><br />
<h2> You are using Internet Explorer! You will probably have problems in here. To avoid problems, please use firefox. <a href="http://www.getfirefox.com">Get it here.<br /></a>
</h2>
(otherwise you may lose your money!)
<![endif]-->
</div>
<!-- /please use firefox -->
Now anyone using IE will see a big warning sign when they enter the casino.