"(TypeError) : Object [object Window] has no method 'jQuery'" errors in JON UI after upgrade to 3.1.2

Issue

• I upgraded my JON environment to 3.1.2, now I'm getting endless "Globally uncaught exception" errors when clicking around in the interface on objects. The full stack trace from the Message Center is:

Message :   
Globally uncaught exception
Severity :  
Error

Time :   
Monday, February 25, 2013 2:39:53 PM UTC-6
Detail : 
com.google.gwt.core.client.JavaScriptException:(TypeError) : Object [object Window] has no method 'jQuery'
--- STACK TRACE FOLLOWS ---
(TypeError) : Object [object Window] has no method 'jQuery'
   at Unknown.org_rhq_enterprise_gui_coregui_client_util_BrowserUtility_graphSparkLines__V(http://aaa.bbb.com:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/9D91F7D263732396B464285EB27061C8.cache.html@8)
   at Unknown.org_rhq_enterprise_gui_coregui_client_dashboard_portlets_groups_GroupMetricsPortlet_startRefreshCycle__V(http://aaa.bbb.com:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/9D91F7D263732396B464285EB27061C8.cache.html@3)
   at Unknown.org_rhq_enterprise_gui_coregui_client_dashboard_PortletFactory_buildPortlet__Ljava_lang_String_2Lorg_rhq_enterprise_gui_coregui_client_dashboard_PortletWindow_2Lorg_rhq_core_domain_dashboard_DashboardPortlet_2Lorg_rhq_core_domain_common_EntityContext_2Lorg_rhq_enterprise_gui_coregui_client_dashboard_Portlet_2(http://aaa.bbb.com:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/9D91F7D263732396B464285EB27061C8.cache.html@295)
   at Unknown.org_rhq_enterprise_gui_coregui_client_dashboard_PortletWindow_onInit__V(http://aaa.bbb.com:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/9D91F7D263732396B464285EB27061C8.cache.html@77)
   at Unknown.com_smartgwt_client_widgets_BaseWidget_doInit__V(http://aaa.bbb.com:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/9D91F7D263732396B464285EB27061C8.cache.html@8)
   at .....