FreeMarker template error!


Expression browser is undefined on line 435, column 15 in page/pageTemplate.ftl.
The problematic instruction:
----------
==> if-else  [on line 435, column 1 in page/pageTemplate.ftl]
 in user-directive planetPage [on line 43, column 1 in layout/planetPage.ftl]
 in user-directive complexPage [on line 11, column 9 in layout/planetContentPage.ftl]
 in user-directive contentPage [on line 3, column 1 in genericPage.ftl]
----------

Java backtrace for programmers:
----------
freemarker.core.InvalidReferenceException: Expression browser is undefined on line 435, column 15 in page/pageTemplate.ftl.
	at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124)
	at freemarker.core.ComparisonExpression.isTrue(ComparisonExpression.java:117)
	at freemarker.core.OrExpression.isTrue(OrExpression.java:68)
	at freemarker.core.IfBlock.accept(IfBlock.java:80)
	at freemarker.core.Environment.visit(Environment.java:171)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:171)
	at freemarker.core.Macro$Context.runMacro(Macro.java:164)
	at freemarker.core.Environment.visit(Environment.java:470)
	at freemarker.core.UnifiedCall.accept(UnifiedCall.java:128)
	at freemarker.core.Environment.visit(Environment.java:171)
	at freemarker.core.Macro$Context.runMacro(Macro.java:164)
	at freemarker.core.Environment.visit(Environment.java:470)
	at freemarker.core.UnifiedCall.accept(UnifiedCall.java:128)
	at freemarker.core.Environment.visit(Environment.java:171)
	at freemarker.core.Macro$Context.runMacro(Macro.java:164)
	at freemarker.core.Environment.visit(Environment.java:470)
	at freemarker.core.UnifiedCall.accept(UnifiedCall.java:128)
	at freemarker.core.Environment.visit(Environment.java:171)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:171)
	at freemarker.core.Environment.process(Environment.java:156)
	at freemarker.template.Template.process(Template.java:219)
	at freemarker.ext.servlet.FreemarkerServlet.process(FreemarkerServlet.java:423)
	at freemarker.ext.servlet.FreemarkerServlet.doGet(FreemarkerServlet.java:362)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	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.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
	at com.opensymphony.webwork.dispatcher.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:64)
	at com.opensymphony.webwork.dispatcher.WebWorkResultSupport.execute(WebWorkResultSupport.java:53)
	at com.opensymphony.xwork.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:274)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:192)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:37)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:170)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:37)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:170)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:37)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:170)
	at com.codefarm.common.interceptor.GlobalErrorsInterceptor.intercept(GlobalErrorsInterceptor.java:40)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:170)
	at com.codefarm.common.interceptor.PurgeFormErrorsInterceptor.intercept(PurgeFormErrorsInterceptor.java:50)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:170)
	at com.codefarm.planet.web.server.AccessSiteDataInterceptor.intercept(AccessSiteDataInterceptor.java:88)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:170)
	at com.codefarm.common.interceptor.HibernateSessionInterceptor.passSessionAndExecute(HibernateSessionInterceptor.java:97)
	at com.codefarm.common.interceptor.HibernateSessionInterceptor.intercept(HibernateSessionInterceptor.java:68)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:170)
	at com.codefarm.common.interceptor.LastActionInterceptor.intercept(LastActionInterceptor.java:108)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:170)
	at com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:116)
	at com.opensymphony.webwork.dispatcher.ServletDispatcher.serviceAction(ServletDispatcher.java:182)
	at com.opensymphony.webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:162)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	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:219)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	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:298)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Unknown Source)