bad charset encoding on <f:param> tag

there is a bug into myfaces 1.1.5 and up.....

on a page as it:

<h:form>
<h:commandLink action="#

{Action.execute}

">
<h:outputText value="some"/>
<f:param name="id" value="#

{instance.id}"/>
</h:commandLink>
</h:form>

using <f:param name="id" value="#{instance.id}

"> tag inside <h:commandLink> , I see that instance.id value has a bad encoding... if I use a word with special characters as à, è, ù, ì as instance.id for example 'modalità' , it is encoded into 'modalit&#224' instead of 'modalit&agrave' . When I click on link through command link, that id cannot to be decoded and so cannot to work with the real value ofinstance.id