When using the <f:ajax> tag, the following stack trace is observed:

org.w3c.dom.DOMException: HIERARCHY_REQUEST_ERR: An attempt was made to insert a node where it is not permitted.
at com.sun.org.apache.xerces.internal.dom.CoreDocumentImpl.insertBefore(CoreDocumentImpl.java:419)
at com.sun.org.apache.xerces.internal.dom.NodeImpl.appendChild(NodeImpl.java:275)
at org.icefaces.context.DOMResponseWriter.appendToCursor(DOMResponseWriter.java:401)
at org.icefaces.context.DOMResponseWriter.startElement(DOMResponseWriter.java:236)
at com.sun.faces.facelets.compiler.StartElementInstruction.write(StartElementInstruction.java:68)
at com.sun.faces.facelets.compiler.UIInstructions.encodeBegin(UIInstructions.java:74)
at com.sun.faces.facelets.compiler.UILeaf.encodeAll(UILeaf.java:178)
at org.icefaces.context.DOMPartialViewContext.processPartial(DOMPartialViewContext.java:102)
at javax.faces.component.UIViewRoot.encodeChildren(UIViewRoot.java:989)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1609)


This is due to a script node being placed in the DOM outside of the html element, causing an attempt to create an XML document with two root elements.