The attached demo code shows a webview with an embedded video. The steps below will make the VM crash.

Error:800401f0 in CoCreateInstance( CLSID_DragDropHelper, NULL, CLSCTX_ALL, IID_IDropTargetHelper, (LPVOID*)&m_spDropTargetHelper )
COM Error:800401f0 CoInitialize has not been called.
#
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x000007fef38621b6, pid=4412, tid=4592
#
# JRE version: 6.0_30-b12
# Java VM: Java HotSpot(TM) 64-Bit Server VM (20.5-b03 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# C [glass.dll+0x121b6]
#
# An error report file with more information is saved as:
# M:\product\trunk\java\WebAssistant-Client\hs_err_pid4412.log
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

Steps:
1. Run demo and start playback of embedded video.
2. Click button.

The crash occurs only when the WebView location is nulled before showing the popup.