The first solution listed in the FAQ (http://community.jboss.org/wiki/inplacesmissesonchangehandler) does not work, but this does:
<a4j:support event="onviewactivated" reRender="output,detail" onsubmit="if(event.memo.oldValue==event.memo.value) return false;"/>
The second solution listed in the FAQ also works. Might want to test/update the FAQ entry. Same goes for the original discussion (http://community.jboss.org/message/19383#19383) of the issue.
Thanks for your help,
Nice to hear that solution works!
in general if you want to correct/add something in our wiki - feel free to do that It's designed as a resource to share all the RF comunity experience and not limited for editing