1) This issue is noticed while running the automated testbase and is consistently reproducible. The issue is that somewhere in between the tests especially while running the applet lifecycle scenarios, where we do page reload/page switch no. of times, FF3.5.6 starts crashing. Below are the crash details
http://sqeweb.sfbay.sun.com/deployment2/jitu/plug-bug/ff3.5.6/firefox3.5_crash.gif
Problem Event Name: APPCRASH
  Application Name: firefox.exe
  Application Version: 1.9.1.3622
  Application Timestamp: 4b16159b
  Fault Module Name: xul.dll
  Fault Module Version: 1.9.1.3622
  Fault Module Timestamp: 4b161468
  Exception Code: c0000005
  Exception Offset: 00072886
  OS Version: 6.0.6001.2.1.0.256.4
  Locale ID: 1033
  Additional Information 1: fd00
  Additional Information 2: ea6f5fe8924aaa756324d57f87834160
  Additional Information 3: fd00
  Additional Information 4: ea6f5fe8924aaa756324d57f87834160

2) While running some of the ALC testcases exception mentioned below is getting thrown and applet fails to to reload
Try to load the applet and try to reload the page couple of times
http://sqeweb.sfbay.sun.com/deployment2/jitu/plug-bug/ojiliveconnect/src/MultipleAppTestDnD.html
java.awt.IllegalComponentStateException: Native resources unavailable
at sun.awt.windows.WPanelPeer.pRestack(Native Method)
at sun.awt.windows.WPanelPeer.restack(Unknown Source)
at sun.awt.windows.WWindowPeer.restack(Unknown Source)
at java.awt.Container.addNotify(Unknown Source)
at java.awt.Window.addNotify(Unknown Source)
at java.awt.Frame.addNotify(Unknown Source)
at sun.awt.EmbeddedFrame.addNotify(Unknown Source)
at sun.awt.windows.WEmbeddedFrame.addNotify(Unknown Source)
at sun.plugin2.main.client.PluginEmbeddedFrame.addNotify(Unknown Source)
at sun.awt.windows.WEmbeddedFrame.<init>(Unknown Source)
at sun.plugin2.main.client.PluginEmbeddedFrame.<init>(Unknown Source)
at sun.plugin2.main.client.PluginMain$StartAppletRunner.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
PluginMain: could not create embedded frame
netscape.javascript.JSException
at netscape.javascript.JSObject.getWindow(Unknown Source)
at MultipleAppTest.init(MultipleAppTest.java:34)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: netscape.javascript.JSException: No registered plugin for applet ID 692
at sun.plugin2.main.client.MessagePassingExecutionContext.getJSObject(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletContextImpl.getJSObject(Unknown Source)
... 4 more
Exception: netscape.javascript.JSException