since updted 1.3.2, program crashes when enterin underworld thrugh portal. I see the underworl and it crashes while still in the exit portal in the underworld. I see the ``generating the world`` message then it crashes...

this is the report that his being generated each time the program crashes:

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  Internal Error (os_windows_x86.cpp:149), pid=3636, tid=3336
#  guarantee(result == EXCEPTION_CONTINUE_EXECUTION) failed: Unexpected result from topLevelExceptionFilter
#
# JRE version: 6.0_31-b05
# Java VM: Java HotSpot(TM) 64-Bit Server VM (20.6-b01 mixed mode windows-amd64 compressed oops)
# If you would like to submit a bug report, please visit:
#   http://java.sun.com/webapps/bugreport/crash.jsp
#

---------------  T H R E A D  ---------------

Current thread (0x0000000009ab8800):  JavaThread "Minecraft main thread" daemon [_thread_in_Java, id=3336, stack(0x000000000b3d0000,0x000000000b4d0000)]

Stack: [0x000000000b3d0000,0x000000000b4d0000]
[error occurred during error reporting (printing stack bounds), id 0xc0000005]


---------------  P R O C E S S  ---------------

Java Threads: ( => current thread )
  0x000000000773f800 JavaThread "File IO Thread" daemon [_thread_blocked, id=6848, stack(0x0000000015130000,0x0000000015230000)]
  0x000000000773e000 JavaThread "Server thread" daemon [_thread_in_native, id=2436, stack(0x0000000012890000,0x0000000012990000)]
  0x000000000773c800 JavaThread "Snooper Timer" daemon [_thread_blocked, id=2660, stack(0x0000000011d10000,0x0000000011e10000)]
  0x000000000773d800 JavaThread "Keep-Alive-Timer" daemon [_thread_blocked, id=5256, stack(0x0000000012610000,0x0000000012710000)]
  0x0000000007560800 JavaThread "Thread-13" daemon [_thread_blocked, id=6780, stack(0x0000000010d40000,0x0000000010e40000)]
  0x0000000007191800 JavaThread "Thread-12" daemon [_thread_blocked, id=5428, stack(0x0000000010c40000,0x0000000010d40000)]
=>0x0000000009ab8800 JavaThread "Minecraft main thread" daemon [_thread_in_Java, id=3336, stack(0x000000000b3d0000,0x000000000b4d0000)]
  0x0000000007812000 JavaThread "Timer hack thread" daemon [_thread_blocked, id=4848, stack(0x000000000b2d0000,0x000000000b3d0000)]
  0x00000000064f9800 JavaThread "Snooper Timer" daemon [_thread_blocked, id=5848, stack(0x000000000aa80000,0x000000000ab80000)]
  0x00000000005bb800 JavaThread "DestroyJavaVM" [_thread_blocked, id=4604, stack(0x00000000026a0000,0x00000000027a0000)]
  0x0000000006eed800 JavaThread "TimerQueue" daemon [_thread_blocked, id=1456, stack(0x0000000008ea0000,0x0000000008fa0000)]
  0x0000000006ca3000 JavaThread "AWT-EventQueue-0" [_thread_blocked, id=6520, stack(0x0000000008c70000,0x0000000008d70000)]
  0x0000000006e08800 JavaThread "AWT-Windows" daemon [_thread_in_native, id=1016, stack(0x0000000007ca0000,0x0000000007da0000)]
  0x0000000006d0f800 JavaThread "AWT-Shutdown" [_thread_blocked, id=5444, stack(0x0000000007ba0000,0x0000000007ca0000)]
  0x0000000006d0f000 JavaThread "Java2D Disposer" daemon [_thread_blocked, id=6768, stack(0x0000000007aa0000,0x0000000007ba0000)]
  0x000000000647c800 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=3476, stack(0x0000000006a20000,0x0000000006b20000)]
  0x0000000006476000 JavaThread "C2 CompilerThread1" daemon [_thread_blocked, id=4732, stack(0x0000000006920000,0x0000000006a20000)]
  0x0000000000528000 JavaThread "C2 CompilerThread0" daemon [_thread_blocked, id=4628, stack(0x0000000006820000,0x0000000006920000)]
  0x0000000000526000 JavaThread "Attach Listener" daemon [_thread_blocked, id=5316, stack(0x0000000006720000,0x0000000006820000)]
  0x0000000000525000 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=2640, stack(0x0000000006620000,0x0000000006720000)]
  0x0000000000511800 JavaThread "Finalizer" daemon [_thread_blocked, id=6820, stack(0x0000000006320000,0x0000000006420000)]
  0x0000000000507000 JavaThread "Reference Handler" daemon [_thread_blocked, id=6712, stack(0x0000000006220000,0x0000000006320000)]

Other Threads:
  0x0000000000501000 VMThread [stack: 0x0000000006120000,0x0000000006220000] [id=6088]
  0x0000000006495800 WatcherThread [stack: 0x0000000006b20000,0x0000000006c20000] [id=2008]

VM state:not at safepoint (normal execution)

VM Mutex/Monitor currently owned by a thread: None

Heap
 PSYoungGen      total 152896K, used 110831K [0x00000000eaab0000, 0x00000000f5550000, 0x0000000100000000)
  eden space 131072K, 84% used [0x00000000eaab0000,0x00000000f16ebf08,0x00000000f2ab0000)
  from space 21824K, 0% used [0x00000000f4000000,0x00000000f4000000,0x00000000f5550000)
  to   space 21824K, 0% used [0x00000000f2ab0000,0x00000000f2ab0000,0x00000000f4000000)
 PSOldGen        total 349568K, used 81021K [0x00000000c0000000, 0x00000000d5560000, 0x00000000eaab0000)
  object space 349568K, 23% used [0x00000000c0000000,0x00000000c4f1f498,0x00000000d5560000)
 PSPermGen       total 59712K, used 29212K [0x00000000bae00000, 0x00000000be850000, 0x00000000c0000000)
  object space 59712K, 48% used [0x00000000bae00000,0x00000000bca87058,0x00000000be850000)

Code Cache  [0x00000000027a0000, 0x0000000002af0000, 0x00000000057a0000)
 total_blobs=1554 nmethods=853 adapters=653 free_code_cache=46987712 largest_free_block=11008

Dynamic libraries:
0x0000000000400000 - 0x000000000042f000 	C:\Program Files\Java\jre6\bin\javaw.exe
0x0000000076ed0000 - 0x0000000077079000 	C:\Windows\SYSTEM32\ntdll.dll
0x0000000076a50000 - 0x0000000076b6f000 	C:\Windows\system32\kernel32.dll
0x000007fefcad0000 - 0x000007fefcb3c000 	C:\Windows\system32\KERNELBASE.dll
0x000007fefe540000 - 0x000007fefe61b000 	C:\Windows\system32\ADVAPI32.dll
0x000007fefe1a0000 - 0x000007fefe23f000 	C:\Windows\system32\msvcrt.dll
0x000007fefdbd0000 - 0x000007fefdbef000 	C:\Windows\SYSTEM32\sechost.dll
0x000007fefe010000 - 0x000007fefe13d000 	C:\Windows\system32\RPCRT4.dll
0x00000000767f0000 - 0x00000000768ea000 	C:\Windows\system32\USER32.dll
0x000007fefdcd0000 - 0x000007fefdd37000 	C:\Windows\system32\GDI32.dll
0x000007fefdfa0000 - 0x000007fefdfae000 	C:\Windows\system32\LPK.dll
0x000007fefcb40000 - 0x000007fefcc09000 	C:\Windows\system32\USP10.dll
0x000007fefdf70000 - 0x000007fefdf9e000 	C:\Windows\system32\IMM32.DLL
0x000007fefcc10000 - 0x000007fefcd19000 	C:\Windows\system32\MSCTF.dll
0x00000000222f0000 - 0x00000000223f5000 	C:\Program Files\CheckPoint\ZAForceField\Plugins\ISWSHEX.dll
0x00000000727e0000 - 0x00000000728a9000 	C:\Windows\WinSxS\amd64_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.4940_none_88df89932faf0bf6\MSVCR80.dll
0x000007fefc990000 - 0x000007fefc9c9000 	C:\Windows\system32\WINTRUST.dll
0x000007fefc820000 - 0x000007fefc98a000 	C:\Windows\system32\CRYPT32.dll
0x000007fefc810000 - 0x000007fefc81f000 	C:\Windows\system32\MSASN1.dll
0x00000000726d0000 - 0x00000000727d9000 	C:\Windows\WinSxS\amd64_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.4940_none_88df89932faf0bf6\MSVCP80.dll
0x000007fefdd40000 - 0x000007fefdf43000 	C:\Windows\system32\ole32.dll
0x000007fefb470000 - 0x000007fefb49d000 	C:\Windows\system32\ntmarta.dll
0x000007fefe140000 - 0x000007fefe192000 	C:\Windows\system32\WLDAP32.dll
0x000000006d800000 - 0x000000006dfb8000 	C:\Program Files\Java\jre6\bin\server\jvm.dll
0x000007fef9030000 - 0x000007fef906b000 	C:\Windows\system32\WINMM.dll
0x000000006d770000 - 0x000000006d77e000 	C:\Program Files\Java\jre6\bin\verify.dll
0x000000006d3b0000 - 0x000000006d3d7000 	C:\Program Files\Java\jre6\bin\java.dll
0x000000006d7c0000 - 0x000000006d7d2000 	C:\Program Files\Java\jre6\bin\zip.dll
0x000000006d000000 - 0x000000006d1c4000 	C:\Program Files\Java\jre6\bin\awt.dll
0x000007fef7330000 - 0x000007fef73a1000 	C:\Windows\system32\WINSPOOL.DRV
0x000007fefcd20000 - 0x000007fefdaa8000 	C:\Windows\system32\SHELL32.dll
0x000007fefe240000 - 0x000007fefe2b1000 	C:\Windows\system32\SHLWAPI.dll
0x000007fefae00000 - 0x000007fefaff4000 	C:\Windows\WinSxS\amd64_microsoft.windows.common-controls_6595b64144ccf1df_6.0.7601.17514_none_fa396087175ac9ac\COMCTL32.dll
0x000007fefa870000 - 0x000007fefa888000 	C:\Windows\system32\DWMAPI.DLL
0x000007fefb4d0000 - 0x000007fefb526000 	C:\Windows\system32\uxtheme.dll
0x000007fefc740000 - 0x000007fefc74f000 	C:\Windows\system32\CRYPTBASE.dll
0x0000000180000000 - 0x000000018004a000 	C:\Program Files\Acer\Acer ePower Management\SysHook.dll
0x000007fefdbf0000 - 0x000007fefdcc7000 	C:\Windows\system32\OLEAUT32.dll
0x000000006d2a0000 - 0x000000006d307000 	C:\Program Files\Java\jre6\bin\fontmanager.dll
0x000000006d610000 - 0x000000006d627000 	C:\Program Files\Java\jre6\bin\net.dll
0x000007fefdfc0000 - 0x000007fefe00d000 	C:\Windows\system32\WS2_32.dll
0x000007fefdfb0000 - 0x000007fefdfb8000 	C:\Windows\system32\NSI.dll
0x000007fefc140000 - 0x000007fefc195000 	C:\Windows\system32\mswsock.dll
0x000007fefc130000 - 0x000007fefc137000 	C:\Windows\System32\wship6.dll
0x000000006d630000 - 0x000000006d63b000 	C:\Program Files\Java\jre6\bin\nio.dll
0x000007fefb4b0000 - 0x000007fefb4c5000 	C:\Windows\system32\NLAapi.dll
0x000007fef7d60000 - 0x000007fef7d75000 	C:\Windows\system32\napinsp.dll
0x000007fef7d40000 - 0x000007fef7d59000 	C:\Windows\system32\pnrpnsp.dll
0x000007fefbed0000 - 0x000007fefbf2b000 	C:\Windows\system32\DNSAPI.dll
0x000007fef8f80000 - 0x000007fef8f8b000 	C:\Windows\System32\winrnr.dll
0x000007fef7d10000 - 0x000007fef7d3e000 	C:\Program Files\Common Files\Microsoft Shared\Windows Live\WLIDNSP.DLL
0x00000000770a0000 - 0x00000000770a7000 	C:\Windows\system32\PSAPI.DLL
0x0000000072170000 - 0x0000000072196000 	C:\Program Files\Bonjour\mdnsNSP.dll
0x000007fefa7f0000 - 0x000007fefa817000 	C:\Windows\system32\Iphlpapi.DLL
0x000007fefa6a0000 - 0x000007fefa6ab000 	C:\Windows\system32\WINNSI.DLL
0x000007fefa4f0000 - 0x000007fefa543000 	C:\Windows\System32\fwpuclnt.dll
0x000007fef8e10000 - 0x000007fef8e18000 	C:\Windows\system32\rasadhlp.dll
0x000007fefb940000 - 0x000007fefb947000 	C:\Windows\System32\wshtcpip.dll
0x000007fefc1a0000 - 0x000007fefc1b7000 	C:\Windows\system32\CRYPTSP.dll
0x000007fefbe40000 - 0x000007fefbe87000 	C:\Windows\system32\rsaenh.dll
0x000007fefba60000 - 0x000007fefba7e000 	C:\Windows\system32\USERENV.dll
0x000007fefc770000 - 0x000007fefc77f000 	C:\Windows\system32\profapi.dll
0x0000000008d70000 - 0x0000000008db8000 	C:\Users\Julie\AppData\Roaming\.minecraft\bin\natives\lwjgl64.dll
0x000007fef7190000 - 0x000007fef72ad000 	C:\Windows\system32\OPENGL32.dll
0x000007fef7160000 - 0x000007fef718d000 	C:\Windows\system32\GLU32.dll
0x000007fef7060000 - 0x000007fef7151000 	C:\Windows\system32\DDRAW.dll
0x000007fef73c0000 - 0x000007fef73c8000 	C:\Windows\system32\DCIMAN32.dll
0x000000000b0f0000 - 0x000000000b2c7000 	C:\Windows\system32\SETUPAPI.dll
0x000007fefc9f0000 - 0x000007fefca26000 	C:\Windows\system32\CFGMGR32.dll
0x000007fefc9d0000 - 0x000007fefc9ea000 	C:\Windows\system32\DEVOBJ.dll
0x000007fefbe30000 - 0x000007fefbe3c000 	C:\Windows\system32\VERSION.dll
0x000000006d3f0000 - 0x000000006d3f7000 	C:\Program Files\Java\jre6\bin\jawt.dll
0x000000000b4d0000 - 0x000000000c6bd000 	C:\Windows\system32\ig4icd64.dll
0x000007fef2e00000 - 0x000007fef2f22000 	C:\Users\Julie\AppData\Roaming\.minecraft\bin\natives\OpenAL64.dll
0x000007fef7420000 - 0x000007fef74a8000 	C:\Windows\system32\dsound.dll
0x000007fefa4b0000 - 0x000007fefa4dc000 	C:\Windows\system32\POWRPROF.dll
0x000007fefdb30000 - 0x000007fefdbc9000 	C:\Windows\system32\CLBCatQ.DLL
0x000007fefb380000 - 0x000007fefb3cb000 	C:\Windows\System32\MMDevApi.dll
0x000007fefb250000 - 0x000007fefb37c000 	C:\Windows\System32\PROPSYS.dll
0x000007fef6fb0000 - 0x000007fef6feb000 	C:\Windows\system32\wdmaud.drv
0x0000000071ed0000 - 0x0000000071ed6000 	C:\Windows\system32\ksuser.dll
0x000007fefa480000 - 0x000007fefa489000 	C:\Windows\system32\AVRT.dll
0x000007fef73d0000 - 0x000007fef741f000 	C:\Windows\system32\AUDIOSES.DLL
0x000007fef72d0000 - 0x000007fef72da000 	C:\Windows\system32\msacm32.drv
0x000007fef72b0000 - 0x000007fef72c8000 	C:\Windows\system32\MSACM32.dll
0x000007fef7020000 - 0x000007fef7029000 	C:\Windows\system32\midimap.dll
0x000000006d550000 - 0x000000006d55a000 	C:\Program Files\Java\jre6\bin\management.dll

VM Arguments:
jvm_args: -Xms512m -Xmx1024m 
java_command: C:\Users\Julie\Desktop\Robert\Minecraft.exe
Launcher Type: SUN_STANDARD

Environment Variables:
CLASSPATH=.;C:\Program Files (x86)\QuickTime\QTSystem\QTJava.zip
PATH=C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Windows Live\Shared;C:\Program Files (x86)\QuickTime\QTSystem\;C:\Program Files (x86)\Druide\Antidote;C:\Program Files\Java\jre6\bin
USERNAME=Julie
OS=Windows_NT
PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 37 Stepping 5, GenuineIntel



---------------  S Y S T E M  ---------------

OS: Windows 7 , 64 bit Build 7601 Service Pack 1

CPU:total 2 (2 cores per cpu, 1 threads per core) family 6 model 37 stepping 5, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3, popcnt

Memory: 4k page, physical 5954260k(3732432k free), swap 11906668k(8367236k free)

vm_info: Java HotSpot(TM) 64-Bit Server VM (20.6-b01) for windows-amd64 JRE (1.6.0_31-b05), built on Feb  3 2012 18:34:57 by "java_re" with MS VC++ 8.0 (VS2005)

time: Sun Dec 30 16:25:02 2012
elapsed time: 18 seconds