A JS error happens when clicking on some of the buttons and links in the basic & compat-basic sample applications, with the ICEfaces EE 2.0 icefaces-ee-ext.jar in the sample app class path.
The attached screen shots show the error occuring when running the automated tests for these sample apps on IE7.

Steps to reproduce the issue for the sample basic app:
- Check out icefaces2 (location: http://server.ice:8888/svn/ossrepo/icefaces-ee/scratchpads/grimlock/icefaces )
- Download ICEfaces EE 2.0 icefaces-ee-ext.jar from: http://www.icefaces.org/main/downloads/os-downloads.iface
- Place the jar file under grimlock/icefaces/lib.
- Build icefaces.
- Deploy basic.war (or compat-basic.war) onto tomcat.
- Load the sample app test page in IE 7 or IE8: http://localhost:8080/basic/icefaces.jsf
- Click on the link: 'Stock JSF Page' -> JS error occurs.
- Close the error popup window, this allows for the page http://localhost:8080/basic/nonicefaces.jsf to fully load.
- Click on any of the 'Reload', or 'Stock JSF Page' button -> JS error occurs.

This JS error appears to happen only when clicking on buttons on this page: http://localhost:8080/basic/nonicefaces.jsf