I deployed the demo war from
http://repository.jboss.org/maven2/org/richfaces/samples/richfaces-demo/3.3.0.BETA3/
and found that when the checkbox for turning on flash mode is checked the file upload dialog box does not open up
https://jira.jboss.org/jira/browse/RF-4917 was fixed later. please check latest snapshot or wait for the beta 4