CommandButton linked to same page causes infinite loop

I'm working on an jsf application with a quite complex interface. I used to deploy it with the MyFaces implementation of jsf. Because of some irratic behavior I want to test Sun's reference implementation. Everything works just fine except when my commandButtons are linked back to the same jsp, configured as a navigation-rule in my faces-config.xml. When I click the button the configured handler-method gets called infinitely(the method works fine, no exception thrown). Any ideas why this is happening?
/Dan
From "bolagsstammoAktiebok.jspx"
<h:commandButton action="#{bolagsstammoAktiebokHandler.berakna}" styleClass="styleinput" immediate="true"
                                                 value="Beräkna"/>From faces-config.xml
<navigation-case>           <from-action>#{bolagsstammoAktiebokHandler.berakna}</from-action>
            <from-outcome>success</from-outcome>
            <to-view-id>bolagsstammoAktiebok.jspx</to-view-id>
        </navigation-case>

Why make a navigation rule that navigates to the same
page ?
Just return "" from the
bolagsstammoAktiebokHandler.berakna method.That helps in that particular case. The problem persists when I try to navigate to another jsp, though. In that case I must use a navigation-rule.

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