Please refer to the attached portlet for a way to reproduce this one.

When the view is initially rendered with an HTTP-GET, the following <form> appears in the rendered markup of the page:


<form name="v31jf08" method="post" id="v31jf08" action="http://localhost:8080/web/guest/ice2?_1_WAR_icefaces2xcompatportlet_INSTANCE_Fpb4__facesViewId=%2Fxhtml%2FportletViewMode.xhtml&amp;p_auth=nFDd6uMq&amp;p_p_col_count=1&amp;p_p_col_id=column-1&amp;p_p_id=1_WAR_icefaces2xcompatportlet_INSTANCE_Fpb4&amp;p_p_lifecycle=1&amp;p_p_mode=view&amp;p_p_state=normal">
<input type="hidden" value="v31jf08" name="v31jf08">
<input type="hidden" value="http://localhost:8080/web/guest/ice2?p_p_cacheability=cacheLevelPage&amp;p_p_col_count=1&amp;p_p_col_id=column-1&amp;p_p_id=1_WAR_icefaces2xcompatportlet_INSTANCE_Fpb4&amp;p_p_lifecycle=2&amp;p_p_mode=view&amp;p_p_state=normal" name="javax.faces.encodedURL">
<span id="v31jf08hdnFldsDiv">
<input type="hidden" name="1360817547:f2:j_idcl">
<input type="hidden" name="1360817547:f2:j_id1360817547:f2:dateOfBirthsp">
</span>
<input type="hidden" autocomplete="off" value="-5481536192991678120:-511719377066662166" id="javax.faces.ViewState" name="javax.faces.ViewState">
</form>

But after typing "32801" in the PostalCode field, the DOM-replacement is this:


<form action="http://localhost:8080/web/guest/ice2?_1_WAR_icefaces2xcompatportlet_INSTANCE_Fpb4__facesViewId=%2Fxhtml%2FportletViewMode.xhtml&amp;p_auth=nFDd6uMq&amp;p_p_col_count=1&amp;p_p_col_id=column-1&amp;p_p_id=1_WAR_icefaces2xcompatportlet_INSTANCE_Fpb4&amp;p_p_lifecycle=1&amp;p_p_mode=view&amp;p_p_state=normal" id="v31jf08" method="post" name="v31jf08">
<input name="v31jf08" type="hidden" value="v31jf08" />
<input name="javax.faces.encodedURL" type="hidden" value="http://localhost:8080/web/guest/ice2?p_p_cacheability=cacheLevelPage&amp;p_p_col_count=1&amp;p_p_col_id=column-1&amp;p_p_id=1_WAR_icefaces2xcompatportlet_INSTANCE_Fpb4&amp;p_p_lifecycle=2&amp;p_p_mode=view&amp;p_p_state=normal" />
<input autocomplete="off" id="javax.faces.ViewState" name="javax.faces.ViewState" type="hidden" value="-5481536192991678120:-511719377066662166" />
<span id="v31jf08hdnFldsDiv">
<input name="1360817547:f2:j_idcl" type="hidden" />
<input name="1360817547:f2:j_id1360817547:f2:dateOfBirthsp" type="hidden" />
</span>
</form>

Even though the form is essentially the same, the order of elements, and the order of attributes on elements is different. This is causing a DOM-diff of the form and an unnecessary incremental page update.