This happened to me and too me a long time to figure it out. Make sure you don't have a control deep inside other control and bind to data somehow. I had to restart the page from scratch and remove items one by one until I found the culprit. Maybe this is your problem?
Also check out this post
http://www-10.lotus.com/ldd/xpagesforum.nsf/topicThread.xsp?action=openDocument&documentId=8FA4B76098E5A801852578E80032635F