Cygwin 1.7 beta XWin Crashs from Ubuntun 9.10 after Firefox sessions

[ERIC HO <ericmho at shaw dot ca>]

I ssh to Ubuntu 9.10 box and brought up Firefox. After a few screens I've got XWin crashes. I've got the following:
Welcome to the XWin X Server
Vendor: The Cygwin/X Project
Release: 1.7.1.0 (10701000)
Build Date: 2009-10-25

Contact: cygwin-xfree@cygwin.com

XWin was started with the following command line:

Xwin -clipboard

ddxProcessArgument - Initializing default screens
winInitializeDefaultScreens - w 1024 h 768
winInitializeDefaultScreens - Returning
2009-10-31 17:30:37 _XSERVTransSocketOpenCOTSServer: Unable to open socket for inet6
2009-10-31 17:30:37 _XSERVTransOpen: transport open failed for inet6/xxxxxx:0
2009-10-31 17:30:37 _XSERVTransMakeAllCOTSServerListeners: failed to open listener for inet6
2009-10-31 17:30:37 winValidateArgs - g_iNumScreens: 1 iMaxConsecutiveScreen: 1
2009-10-31 17:30:37 (II) xorg.conf is not supported
2009-10-31 17:30:37 (II) See http://x.cygwin.com/docs/faq/cygwin-x-faq.html for more information
2009-10-31 17:30:37 winPrefsLoadPreferences: /etc/X11/system.XWinrc
2009-10-31 17:30:37 LoadPreferences: Done parsing the configuration file...
2009-10-31 17:30:37 winGetDisplay: DISPLAY=:0.0
2009-10-31 17:30:37 winDetectSupportedEngines - Windows NT/2000/XP
2009-10-31 17:30:37 winDetectSupportedEngines - DirectDraw installed
2009-10-31 17:30:37 winDetectSupportedEngines - DirectDraw4 installed
2009-10-31 17:30:37 winDetectSupportedEngines - Returning, supported engines 00000007
2009-10-31 17:30:37 winSetEngine - Using Shadow DirectDraw NonLocking
2009-10-31 17:30:37 winAdjustVideoModeShadowDDNL - Using Windows display depth of 32 bits per pixel
2009-10-31 17:30:37 winFinishScreenInitFB - Masks: 00ff0000 0000ff00 000000ff
2009-10-31 17:30:37 Screen 0 added at XINERAMA coordinate (0,0).
2009-10-31 17:30:37 MIT-SHM extension disabled due to lack of kernel support
2009-10-31 17:30:37 XFree86-Bigfont extension local-client optimization disabled due to lack of shared memory support in the kernel
2009-10-31 17:30:37 (II) AIGLX: Loaded and initialized /usr/lib/dri/swrast_dri.so
2009-10-31 17:30:37 (II) GLX: Initialized DRISWRAST GL provider for screen 0
2009-10-31 17:30:37 [dix] Could not init font path element /usr/share/fonts/OTF/, removing from list!
2009-10-31 17:30:37 winPointerWarpCursor - Discarding first warp: 509 336
2009-10-31 17:30:37 (--) 5 mouse buttons found
2009-10-31 17:30:37 (--) Setting autorepeat to delay=500, rate=31
2009-10-31 17:30:37 (--) winConfigKeyboard - Layout: "00000409" (00000409)
2009-10-31 17:30:37 (--) Using preset keyboard for "English (USA)" (409), type "4"
2009-10-31 17:30:37 Rules = "base" Model = "pc105" Layout = "us" Variant = "none" Options = "none"
2009-10-31 17:31:14 winProcEstablishConnection - Hello
2009-10-31 17:31:14 winInitClipboard ()
2009-10-31 17:31:14 winProcEstablishConnection - winInitClipboard returned.
2009-10-31 17:31:14 winClipboardProc - Hello
2009-10-31 17:31:14 DetectUnicodeSupport - Windows NT/2000/XP
2009-10-31 17:31:14 winGetDisplay: DISPLAY=:0.0
2009-10-31 17:31:14 winClipboardProc - DISPLAY=:0.0
2009-10-31 17:31:14 winClipboardProc - XOpenDisplay () returned and successfully opened the display.
2009-10-31 17:32:18 Segmentation fault at address 0x0
2009-10-31 17:32:18
Fatal server error:
2009-10-31 17:32:18 Caught signal 11 (Segmentation fault). Server aborting
2009-10-31 17:32:18

Any idea what could be the problem. Thanks.

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