I made a few tests with others richfaces versions using this sample code.
3.3.2 SR1 doesn't work
3.3.3 BETA1 doesn't work
3.3.3 CR1 doesn't work
It seems to be a regression...
Do you know when the GA version will be born?
a4j:outputPanel has special features to handle AJAX requests. You code should work fine with h:panelGroup instead
<rich:messages level="INFO" ajaxRendered="false"/>
Got the same bug, the messages with the level attribute still dont get rendered. Did i miss something on this workaround?