SoapUI Pro exceptions opening REST test steps

Sorry for posting in the wrong forum, but I can't post in bugs or SoapUI Pro forums. I

I'm running Ubuntu 11.04 and using a trial license with versions 3.6.1 and 4.0.0 of SoapUI pro. When I try to open a REST Test Request step in 3.6.1, the following exception is thrown:

Fri Jun 17 14:15:59 EDT 2011:ERROR:java.lang.RuntimeException: java.lang.NoClassDefFoundError: Could not initialize class com.jniwrapper.gtk.Window

   java.lang.RuntimeException: java.lang.NoClassDefFoundError: Could not initialize class com.jniwrapper.gtk.Window

    at com.teamdev.xpcom.b.invokeAndWait(Unknown Source)

    at com.teamdev.xpcom.Xpcom.invokeAndWait(Unknown Source)

    at com.teamdev.jxbrowser1.impl.AWTMozillaBrowser.<init>(Unknown Source)

    at com.teamdev.jxbrowser1.impl.AWTMozillaBrowser.<init>(Unknown Source)

    at com.teamdev.jxbrowser.mozilla.MozillaBrowserFactory.create(Unknown Source)

    at com.teamdev.jxbrowser.BrowserFactory.createBrowser(Unknown Source)

    at com.eviware.soapui.support.components.BrowserComponent.initBrowser(BrowserComponent.java:570)

    at com.eviware.soapui.support.components.BrowserComponent.getComponent(BrowserComponent.java:197)

    at com.eviware.soapui.impl.rest.panels.request.views.html.HttpHtmlResponseView.getComponent(HttpHtmlResponseView.java:114)

    at com.eviware.soapui.support.editor.Editor.addEditorView(Editor.java:64)

    at com.eviware.soapui.impl.support.components.ResponseMessageXmlEditor.<init>(ResponseMessageXmlEditor.java:49)

    at com.eviware.soapui.impl.support.panels.AbstractHttpRequestDesktopPanel$AbstractHttpResponseMessageEditor.<init>(AbstractHttpRequestDesktopPanel.java:364)

    at com.eviware.soapui.impl.support.panels.AbstractHttpXmlRequestDesktopPanel$HttpResponseMessageEditor.<init>(AbstractHttpXmlRequestDesktopPanel.java:60)

    at com.eviware.soapui.impl.support.panels.AbstractHttpXmlRequestDesktopPanel.buildResponseEditor(AbstractHttpXmlRequestDesktopPanel.java:43)

    at com.eviware.soapui.impl.support.panels.AbstractHttpRequestDesktopPanel.buildContent(AbstractHttpRequestDesktopPanel.java:203)

    at com.eviware.soapui.impl.wsdl.panels.teststeps.RestTestRequestDesktopPanel.buildContent(RestTestRequestDesktopPanel.java:120)

    at com.eviware.soapui.impl.support.panels.AbstractHttpRequestDesktopPanel.init(AbstractHttpRequestDesktopPanel.java:131)

    at com.eviware.soapui.impl.support.panels.AbstractHttpRequestDesktopPanel.<init>(AbstractHttpRequestDesktopPanel.java:108)

    at com.eviware.soapui.impl.support.panels.AbstractHttpXmlRequestDesktopPanel.<init>(AbstractHttpXmlRequestDesktopPanel.java:31)

    at com.eviware.soapui.impl.rest.panels.request.AbstractRestRequestDesktopPanel.<init>(AbstractRestRequestDesktopPanel.java:67)

    at com.eviware.soapui.impl.wsdl.panels.teststeps.RestTestRequestDesktopPanel.<init>(RestTestRequestDesktopPanel.java:67)

    at com.eviware.soapui.impl.wsdl.panels.teststeps.ProRestTestRequestDesktopPanel.<init>(SourceFile:32)

    at com.eviware.soapui.impl.wsdl.panels.teststeps.ProRestTestRequestStepPanelBuilder.buildDesktopPanel(SourceFile:22)

    at com.eviware.soapui.impl.wsdl.panels.teststeps.ProRestTestRequestStepPanelBuilder.buildDesktopPanel(SourceFile:17)

    at com.eviware.soapui.ui.TabbedSoapUIDesktop.showDesktopPanel(SourceFile:211)

    at com.eviware.soapui.support.UISupport.showDesktopPanel(UISupport.java:571)

    at com.eviware.soapui.support.UISupport.selectAndShow(UISupport.java:559)

    at com.eviware.soapui.impl.wsdl.actions.support.ShowDesktopPanelAction.perform(ShowDesktopPanelAction.java:53)

    at com.eviware.soapui.support.action.swing.SwingActionDelegate.actionPerformed(SwingActionDelegate.java:89)

    at com.eviware.soapui.support.action.swing.DefaultActionList.performDefaultAction(DefaultActionList.java:107)

    at com.eviware.soapui.ui.Navigator$TreeMouseListener$1.run(Navigator.java:408)

    at java.awt.event.InvocationEvent.dispatch(Unknown Source)

    at java.awt.EventQueue.dispatchEvent(Unknown Source)

    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)

    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)

    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

    at java.awt.EventDispatchThread.run(Unknown Source)

   Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.jniwrapper.gtk.Window

    at com.teamdev.jxbrowser1.b.a.a.b.<init>(Unknown Source)

    at com.teamdev.jxbrowser1.a.b.a.<init>(Unknown Source)

    at com.teamdev.jxbrowser1.a.e.a(Unknown Source)

    at com.teamdev.jxbrowser1.impl.c.c(Unknown Source)

    at com.teamdev.jxbrowser1.impl.c.<init>(Unknown Source)

    at com.teamdev.jxbrowser1.impl.c.<init>(Unknown Source)

    at com.teamdev.jxbrowser1.impl.AWTMozillaBrowser$a.run(Unknown Source)

    at com.teamdev.xpcom.MozillaCallback.run(Unknown Source)

    at org.mozilla.xpcom.internal.XPCOMJavaProxy.callXPCOMMethod(Native Method)

    at org.mozilla.xpcom.internal.XPCOMJavaProxy.invoke(XPCOMJavaProxy.java:143)

    at $Proxy10.run(Unknown Source)

    at com.teamdev.xpcom.b$b.run(Unknown Source)

Doing the same thing in 4.0.0 beta, I get:

Fri Jun 17 14:25:46 EDT 2011:ERROR:org.mozilla.xpcom.XPCOMException: The function "run" returned an error condition  (0x80004005)

   org.mozilla.xpcom.XPCOMException: The function "run" returned an error condition  (0x80004005)

    at org.mozilla.xpcom.internal.XPCOMJavaProxy.callXPCOMMethod(Native Method)

    at org.mozilla.xpcom.internal.XPCOMJavaProxy.invoke(XPCOMJavaProxy.java:143)

    at $Proxy10.run(Unknown Source)

    at com.teamdev.xpcom.b.invokeAndWait(Unknown Source)

    at com.teamdev.xpcom.Xpcom.invokeAndWait(Unknown Source)

    at com.teamdev.jxbrowser1.impl.AWTMozillaBrowser.<init>(Unknown Source)

    at com.teamdev.jxbrowser1.impl.AWTMozillaBrowser.<init>(Unknown Source)

    at com.teamdev.jxbrowser.mozilla.MozillaBrowserFactory.create(Unknown Source)

    at com.teamdev.jxbrowser.BrowserFactory.createBrowser(Unknown Source)

    at com.eviware.soapui.support.components.BrowserComponent.initBrowser(BrowserComponent.java:547)

    at com.eviware.soapui.support.components.BrowserComponent.getComponent(BrowserComponent.java:159)

    at com.eviware.soapui.impl.rest.panels.request.views.html.HttpHtmlResponseView.getComponent(HttpHtmlResponseView.java:116)

    at com.eviware.soapui.support.editor.Editor.addEditorView(Editor.java:72)

    at com.eviware.soapui.impl.support.components.ResponseMessageXmlEditor.<init>(ResponseMessageXmlEditor.java:49)

    at com.eviware.soapui.impl.support.panels.AbstractHttpRequestDesktopPanel$AbstractHttpResponseMessageEditor.<init>(AbstractHttpRequestDesktopPanel.java:366)

    at com.eviware.soapui.impl.support.panels.AbstractHttpXmlRequestDesktopPanel$HttpResponseMessageEditor.<init>(AbstractHttpXmlRequestDesktopPanel.java:60)

    at com.eviware.soapui.impl.support.panels.AbstractHttpXmlRequestDesktopPanel.buildResponseEditor(AbstractHttpXmlRequestDesktopPanel.java:43)

    at com.eviware.soapui.impl.support.panels.AbstractHttpRequestDesktopPanel.buildContent(AbstractHttpRequestDesktopPanel.java:203)

    at com.eviware.soapui.impl.wsdl.panels.teststeps.RestTestRequestDesktopPanel.buildContent(RestTestRequestDesktopPanel.java:121)

    at com.eviware.soapui.impl.support.panels.AbstractHttpRequestDesktopPanel.init(AbstractHttpRequestDesktopPanel.java:131)

    at com.eviware.soapui.impl.support.panels.AbstractHttpRequestDesktopPanel.<init>(AbstractHttpRequestDesktopPanel.java:108)

    at com.eviware.soapui.impl.support.panels.AbstractHttpXmlRequestDesktopPanel.<init>(AbstractHttpXmlRequestDesktopPanel.java:31)

    at com.eviware.soapui.impl.rest.panels.request.AbstractRestRequestDesktopPanel.<init>(AbstractRestRequestDesktopPanel.java:67)

    at com.eviware.soapui.impl.wsdl.panels.teststeps.RestTestRequestDesktopPanel.<init>(RestTestRequestDesktopPanel.java:68)

    at com.eviware.soapui.impl.wsdl.panels.teststeps.ProRestTestRequestDesktopPanel.<init>(SourceFile:29)

    at com.eviware.soapui.impl.wsdl.panels.teststeps.ProRestTestRequestStepPanelBuilder.buildDesktopPanel(SourceFile:18)

    at com.eviware.soapui.impl.wsdl.panels.teststeps.ProRestTestRequestStepPanelBuilder.buildDesktopPanel(SourceFile:13)

    at com.eviware.soapui.ui.TabbedSoapUIDesktop.showDesktopPanel(SourceFile:211)

    at com.eviware.soapui.support.UISupport.showDesktopPanel(UISupport.java:571)

    at com.eviware.soapui.support.UISupport.selectAndShow(UISupport.java:559)

    at com.eviware.soapui.impl.wsdl.actions.support.ShowDesktopPanelAction.perform(ShowDesktopPanelAction.java:53)

    at com.eviware.soapui.support.action.swing.SwingActionDelegate.actionPerformed(SwingActionDelegate.java:89)

    at com.eviware.soapui.support.action.swing.DefaultActionList.performDefaultAction(DefaultActionList.java:107)

    at com.eviware.soapui.ui.Navigator$TreeMouseListener$1.run(Navigator.java:408)

    at java.awt.event.InvocationEvent.dispatch(Unknown Source)

    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)

    at java.awt.EventQueue.access$000(Unknown Source)

    at java.awt.EventQueue$1.run(Unknown Source)

    at java.awt.EventQueue$1.run(Unknown Source)

    at java.security.AccessController.doPrivileged(Native Method)

    at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)

    at java.awt.EventQueue.dispatchEvent(Unknown Source)

    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)

    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)

    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

    at java.awt.EventDispatchThread.run(Unknown Source)

Other windows work fine (test cases, test suites, transfer properties all open correctly) and opening these windows in SoapUI 4.0 beta open source works fine. Any idea if there's a quick fix for these problems?