'Sys' is undefined error in AJAX (Atlas) Beta 2

After I installed Beta 2 of the AJAX framework, I started getting the 'Sys' is undefined error message.  After hours of debugging, it turned out that this was because I had anonymous users denied i.e.: 

<authorization>
    <deny users="?"></deny>
</authorization>

So somehow the scripts weren't getting loaded.  It turns out this was a simple fix, all I had to do is add the following code to the config file to allow access the script handler by anonymous users:

<location path="ScriptResource.axd">
   <system.web>
      <authorization>
         <allow users="*"/>
      </authorization>
   </system.web>
</location>