In process of attempting to upgrade a working application from ICEFaces 2.0.2 to ICEFace 3.1, I encountered the exception similar to the exception below. The exception below is generated by the example code I am rpoviding.

I found that the presence of the $ character in one or more of the option values in the selectOneMenu that uses f:ajax will cause the exception when DOMPartialViewContext.applyBrowserChanges() calls appendReplacement().
In our application the data used to build the options is stored in a relational database and in some cases are entered by the application users.
I have built a stripped down example of code that will trigger the exception. I built it as an addition to the ICEFaces showcase samples.

The example by default (tTrigger Exception = No) does not create an exception and allows you to exercise the drop down without a option containing the character $.
You can then use the radio button to select a list of available options that do contain the character $ and see the exception generated.


selectOneMenu.xhtml

<?xml version="1.0"?>
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:c="http://java.sun.com/jsp/jstl/core"
    xmlns:ace="http://www.icefaces.org/icefaces/components"
    xmlns:ice="http://www.icesoft.com/icefaces/component"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    template="/resources/templates/content-template.xhtml">
    
    <ui:param name="title" value="#{msgs[selectOneMenu.title]}"/>
    <ui:param name="description" value="#{msgs[selectOneMenu.description]}"/>
    <ui:param name="resourceValue" value="#{selectOneMenu.exampleResource}"/>
    
    <ui:param name="wikiResources" value="#{compatComponentsResources.wikiResources}"/>
    <ui:param name="tldResources" value="#{compatComponentsResources.tldResources}"/>
    
    <ui:define name="example">
     <h:form>
     <h:panelGroup>
         <h:outputLabel for="triggerException" value="Trigger Exception?"/>
             <h:selectOneRadio id="triggerException" styleClass="radioButtons" value="#{selectOneMenu.triggerException}">
                 <f:selectItem itemValue="true" itemLabel="Yes"/>
                 <f:selectItem itemValue="false" itemLabel="No"/>
                 <f:ajax execute="@this" render="@all"/>
             </h:selectOneRadio>
             <h:message for="triggerException"/>
</h:panelGroup>
    
            <h:panelGroup>
                <h:outputLabel for="currency" value="Select Currency:"/>
                <h:selectOneMenu id="currency" value="#{selectOneMenu.currency}"
                                 required="true">
                     <f:selectItems value="#{selectOneMenu.availableCurrencies}"/>
                     <f:ajax execute="@this" render="@all"/>
                </h:selectOneMenu>
                <h:message for="currency"/>
            </h:panelGroup>
        </h:form>
    </ui:define>
</ui:composition>

selectOneMenu.java


package org.icefaces.samples.showcase.example.compat.selectOneMenu;

import java.io.Serializable;

import javax.annotation.PostConstruct;
import javax.faces.bean.CustomScoped;
import javax.faces.bean.ManagedBean;
import javax.faces.event.ActionEvent;
import javax.faces.context.FacesContext;
import javax.servlet.http.HttpSession;
import javax.faces.model.SelectItem;

import org.icefaces.samples.showcase.metadata.annotation.ComponentExample;
import org.icefaces.samples.showcase.metadata.annotation.ExampleResource;
import org.icefaces.samples.showcase.metadata.annotation.ExampleResources;
import org.icefaces.samples.showcase.metadata.annotation.Menu;
import org.icefaces.samples.showcase.metadata.annotation.MenuLink;
import org.icefaces.samples.showcase.metadata.annotation.ResourceType;
import org.icefaces.samples.showcase.metadata.context.ComponentExampleImpl;

@ComponentExample(
        title = "example.compat.selectOneMenu.title",
        description = "example.compat.selectOneMenu.description",
        example = "/resources/examples/compat/selectOneMenu/selectOneMenu.xhtml"
)
@ExampleResources(
        resources ={
            // xhtml
            @ExampleResource(type = ResourceType.xhtml,
                    title="selectOneMenu.xhtml",
                    resource = "/resources/examples/compat/"+
                               "selectOneMenu/selectOneMenu.xhtml"),
            // Java Source
            @ExampleResource(type = ResourceType.java,
                    title="SelectOneMenu.java",
                    resource = "/WEB-INF/classes/org/icefaces/samples/"+
                               "showcase/example/compat/selectOneMenu/SelectOneMenu.java")
        }
)
@Menu(
title = "menu.compat.selectOneMenu.subMenu.title",
menuLinks = {
            @MenuLink(title = "menu.compat.selectOneMenu.subMenu.main", isDefault = true, exampleBeanName = SelectOneMenu.BEAN_NAME)
})
@ManagedBean(name= SelectOneMenu.BEAN_NAME)
@CustomScoped(value = "#{window}")
public class SelectOneMenu extends ComponentExampleImpl<SelectOneMenu> implements Serializable {

public static final String BEAN_NAME = "selectOneMenu";

    private SelectItem[] availableCurrencies = new SelectItem[] {
            new SelectItem("USD"),
            new SelectItem("CAD")
    };
    
    private SelectItem[] availableCurrenciesTriggerException = new SelectItem[] {
            new SelectItem("USD$"),
            new SelectItem("CAD$")
    };
    
    private String currency = availableCurrencies[0].getValue().toString();
    private Boolean triggerException = false;
    
    public SelectItem[] getAvailableCurrencies() {
     if( triggerException ){
     return availableCurrenciesTriggerException;
     }
     return availableCurrencies;
    }
    
    public String getCurrency() { return currency; }
    public void setCurrency(String currency) { this.currency = currency; }
    public void setTriggerException(Boolean triggerException){ this.triggerException = triggerException; }
    public Boolean getTriggerException(){ return this.triggerException; }
    

public SelectOneMenu() {
super(SelectOneMenu.class);
}

    @PostConstruct
    public void initMetaData() {
        super.initMetaData();
    }

}




SEVERE: Error Rendering View[/showcase.xhtml]
java.lang.IllegalArgumentException: Illegal group reference
at java.util.regex.Matcher.appendReplacement(Matcher.java:713)
at org.icefaces.impl.context.DOMPartialViewContext.applyBrowserChanges(DOMPartialViewContext.java:531)
at org.icefaces.impl.context.DOMPartialViewContext.processPartial(DOMPartialViewContext.java:130)
at javax.faces.component.UIViewRoot.encodeChildren(UIViewRoot.java:981)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1757)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:391)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)