That's right!  ScottGu has blogged about a new hot fix (Microsoft KB #934839).  I've ran into this problem in the past (and blogged about it here).  Scott posted a quick fix you can use without installing the patch:

<configuration>
   <system.web>
       <compilation debug="false" batch="false"></compilation>
   </system.web>
</configuration>

I'm glad to see an official fix being released after a year since the issue emerged.