I have this jsf page with primefaces 3.5. Controller and converter are @Component from spring version 3.0.5.RELEASE.
<h:form>
     <h:panelGrid columns="2" id="grid">
       <h:outputText value="Field names: "/>
          <p:selectOneMenu value="#{controller.something}"
                                                 converter="#{SomethingConverter}">
             <f:selectItems value="#{controller.listOfsomething}"/>
          </p:selectOneMenu>
          <h:outputLabel value="Value : *" for="inputField" />
          <p:inputText id="inputField" required="true"
                          value="#{documentController.documentValue.value}"/>
          <p:commandButton value="Add" action="#{controller.add}" />
     </h:panelGrid>
</h:form>
Class controller have this method:
public String add() {
   //do something
   return null;
}
Which is called only if I remove selectOneMenu component. Values in selectOneMenu are converter successful. 
I have no idea now..
 
    