There is this IE6 SELECT bug (http://throbs.net/web/articles/IE-SELECT-bugs/ bug 4) which ignores the z-index (and causes that select boxes are on top of other elements). The following code works fine in richfaces-3.1.2.GA and 3.1.3.GA but not in in 3.1.4.GA anymore (it seems that the workaround dropped out).

<h:form>
 <rich:toolBar>
 <rich:dropDownMenu value="Menu" >
 <rich:menuItem value="menu 1" />
 <rich:menuItem value="menu 2" />
 <rich:menuItem value="menu 3" />
 <rich:menuItem value="menu 4" />
 </rich:dropDownMenu>
 </rich:toolBar>
 <h:selectOneMenu value="A" >
 <f:selectItem itemValue="A" itemLabel="A value" />
 <f:selectItem itemValue="B" temLabel="B value"/>
 </h:selectOneMenu>
</h:form>

The select box covers the dropdown menu.
This seems to be related to http://jira.jboss.com/jira/browse/RF-2009.

Could you have a look at it since we have still many users having IE6.

Thanks.