NullPointerException on Patch Management tab

I upgraded yesterday to 11.2.3a. When I go to a device and look at the Patches tab, patches are listed with the devices status and I can deploy patches. However, if I go to the main Patch Management home or the Subscription Download on the Configuration home, I get a java.lang.NullPointException. Any ideas would be much appreciated.

Here is the full error details:
16 May 2013 11:55:47 ============== Exception (begin) ===========================
16 May 2013 11:55:47 Exception occured
java.lang.NullPointerException
at java.lang.String.compareTo(String.java:1167)
at java.lang.String.compareTo(String.java:92)
at java.util.Arrays.mergeSort(Arrays.java:1144)
at java.util.Arrays.mergeSort(Arrays.java:1155)
at java.util.Arrays.mergeSort(Arrays.java:1155)
at java.util.Arrays.sort(Arrays.java:1079)
at java.util.Collections.sort(Collections.java:117)
at com.patchlink.sapphire.web.pages.vulnerability.Vie wVulnerabilitiesSnapshot.listOfVendors(ViewVulnera bilitiesSnapshot.java:1652)
at com.patchlink.sapphire.web.pages.vulnerability.Vie wVulnerabilitiesSnapshot.setFilterInfoFromSession( ViewVulnerabilitiesSnapshot.java:1389)
at com.patchlink.sapphire.web.pages.vulnerability.Vie wVulnerabilitiesSnapshot.onInit(ViewVulnerabilitie sSnapshot.java:166)
at com.novell.web.controls.WebControl.initRecursive(W ebControl.java:2085)
at com.novell.web.controls.WebControl.addControl(WebC ontrol.java:1495)
at com.novell.web.controls.WebControl.addControl(WebC ontrol.java:1415)
at com.novell.zenworks.fw.web.internal.layout.PluginT emplate.loadContent(PluginTemplate.java:288)
at com.novell.zenworks.fw.web.internal.layout.Snapsho tTemplate.loadContent(SnapshotTemplate.java:84)
at com.novell.zenworks.fw.web.internal.layout.PluginT emplate.onLoad(PluginTemplate.java:130)
at com.novell.web.controls.WebControl.loadRecursive(W ebControl.java:2423)
at com.novell.zenworks.fw.web.internal.layout.Snapsho tTemplate.loadRecursive(SnapshotTemplate.java:446)
at com.novell.web.controls.WebControl.loadRecursive(W ebControl.java:2429)
at com.novell.web.controls.WebControl.loadRecursive(W ebControl.java:2429)
at com.novell.web.controls.WebControl.loadRecursive(W ebControl.java:2429)
at com.novell.web.controls.WebControl.loadRecursive(W ebControl.java:2429)
at com.novell.web.controls.WebControl.loadRecursive(W ebControl.java:2429)
at com.novell.web.controls.WebControl.loadRecursive(W ebControl.java:2429)
at com.novell.web.controls.WebControl.loadRecursive(W ebControl.java:2429)
at com.novell.web.controls.WebControl.loadRecursive(W ebControl.java:2429)
at com.novell.web.controls.WebControl.loadRecursive(W ebControl.java:2429)
at com.novell.web.controls.WebControl.loadRecursive(W ebControl.java:2429)
at com.novell.web.controls.Page.internalProcessReques t(Page.java:712)
at com.novell.web.controls.Page.processRequest(Page.j ava:667)
at com.novell.zenworks.fw.web.internal.layout.Index.p rocessRequest(Index.java:631)
at com.novell.web.internal.controls.PageTag.doEndTag( PageTag.java:86)
at org.apache.jsp.jsp.index_jsp._jspService(index_jsp .java:187)
at org.apache.jasper.runtime.HttpJspBase.service(Http JspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:717)
at org.apache.jasper.servlet.JspServletWrapper.servic e(JspServletWrapper.java:377)
at org.apache.jasper.servlet.JspServlet.serviceJspFil e(JspServlet.java:313)
at org.apache.jasper.servlet.JspServlet.service(JspSe rvlet.java:260)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:717)
at org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.inv oke(ApplicationDispatcher.java:646)
at org.apache.catalina.core.ApplicationDispatcher.pro cessRequest(ApplicationDispatcher.java:436)
at org.apache.catalina.core.ApplicationDispatcher.doF orward(ApplicationDispatcher.java:342)
at org.apache.catalina.core.ApplicationDispatcher.for ward(ApplicationDispatcher.java:302)
at com.novell.web.NJWCServlet.serviceImpl(NJWCServlet .java:97)
at com.novell.zenworks.fw.web.internal.ZENworksServle t.service(ZENworksServlet.java:84)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:717)
at org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:206)
at com.patchlink.sapphire.web.pages.vulnerability.ses sion.HibernateSessionFilter.doFilter(HibernateSess ionFilter.java:75)
at org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invo ke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invo ke(StandardContextValve.java:191)
at org.apache.catalina.authenticator.AuthenticatorBas e.invoke(AuthenticatorBase.java:563)
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.invok e(StandardEngineValve.java:109)
at com.novell.zenworks.tomcat.ZENRequestValve.invoke( ZENRequestValve.java:1293)
at org.apache.catalina.connector.CoyoteAdapter.servic e(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(H ttp11Processor.java:857)
at org.apache.coyote.http11.Http11Protocol$Http11Conn ectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run( JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)
16 May 2013 11:55:47

Exception Info:
16 May 2013 11:55:47 Class....... java.lang.NullPointerException
16 May 2013 11:55:47 Message..... null
16 May 2013 11:55:47 Logged at... Index...............637
16 May 2013 11:55:47 ============== Exception (end) =============================