diff --git a/indra/cmake/00-Common.cmake b/indra/cmake/00-Common.cmake
index 592e9fc901b5dbd73581320c256c33c77823df6c..a114d6e7783497b8ad194ee5eb9263617ca1c560 100644
--- a/indra/cmake/00-Common.cmake
+++ b/indra/cmake/00-Common.cmake
@@ -74,6 +74,10 @@ if (WINDOWS)
   if (NOT VS_DISABLE_FATAL_WARNINGS)
     add_definitions(/WX)
   endif (NOT VS_DISABLE_FATAL_WARNINGS)
+
+  # configure win32 API for windows XP+ compatibility
+  set(WINVER "0x0501" CACHE STRING "Win32 API Target version (see http://msdn.microsoft.com/en-us/library/aa383745%28v=VS.85%29.aspx)")
+  add_definitions("/DWINVER=${WINVER}" "/D_WIN32_WINNT=${WINVER}")
 endif (WINDOWS)
 
 
diff --git a/indra/llcommon/llapp.cpp b/indra/llcommon/llapp.cpp
index 0447ca93f5cb6d49de632861e5933402c2ac48ff..be3b18d9c82e11723c87cd18e663821ced047c89 100644
--- a/indra/llcommon/llapp.cpp
+++ b/indra/llcommon/llapp.cpp
@@ -863,7 +863,13 @@ bool unix_post_minidump_callback(const char *dump_dir,
 	
 	llinfos << "generated minidump: " << LLApp::instance()->getMiniDumpFilename() << llendl;
 	LLApp::runErrorHandler();
+	
+#ifndef LL_RELEASE_FOR_DOWNLOAD
+	clear_signals();
+	return false;
+#else
 	return true;
+#endif
 }
 #endif // !WINDOWS
 
@@ -920,6 +926,10 @@ bool windows_post_minidump_callback(const wchar_t* dump_path,
 		ms_sleep(10);
 	}
 
+#ifndef LL_RELEASE_FOR_DOWNLOAD
+	return false;
+#else
 	return true;
+#endif
 }
 #endif
diff --git a/indra/newview/CMakeLists.txt b/indra/newview/CMakeLists.txt
index ce42cb60381dbc4d524c005ba294171ad1e29fb4..92f701551b55f30e8eedbc2fd797e688f19bbd68 100644
--- a/indra/newview/CMakeLists.txt
+++ b/indra/newview/CMakeLists.txt
@@ -1150,10 +1150,12 @@ endif (LINUX)
 if (WINDOWS)
     list(APPEND viewer_SOURCE_FILES
          llappviewerwin32.cpp
+         llwindebug.cpp
          )
 
     list(APPEND viewer_HEADER_FILES
          llappviewerwin32.h
+         llwindebug.h
          )
 
     # precompiled header configuration
diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index b493f38d7673d9ff8df993b25d80eed695706ae0..d51498f6d1e93f9140fd9f2c8dcbe05dd0028e2c 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -11404,9 +11404,9 @@
       <key>Persist</key>
       <integer>0</integer>
       <key>Type</key>
-      <string>Boolean</string>
+      <string>S32</string>
       <key>Value</key>
-      <integer>0</integer>
+      <integer>-1</integer>
     </map>
     <key>WaterEditPresets</key>
     <map>
diff --git a/indra/newview/featuretable.txt b/indra/newview/featuretable.txt
index e8591ca0867a4e3a6b93fc5bfb184496bf33e09f..1c763453dc86d097a90aefc5337242409d5b40a6 100644
--- a/indra/newview/featuretable.txt
+++ b/indra/newview/featuretable.txt
@@ -58,6 +58,8 @@ Disregard96DefaultDrawDistance	1	1
 RenderTextureMemoryMultiple		1	1.0
 RenderShaderLightingMaxLevel	1	3
 SkyUseClassicClouds			1	1
+WatchdogDisabled				1	1
+
 
 //
 // Low Graphics Settings
diff --git a/indra/newview/featuretable_linux.txt b/indra/newview/featuretable_linux.txt
index 779490c9f76adc898cd2e910ae0dc05037348b12..45de51f3cf191cbc2d22056a623dc154472c9c37 100644
--- a/indra/newview/featuretable_linux.txt
+++ b/indra/newview/featuretable_linux.txt
@@ -57,6 +57,7 @@ Disregard128DefaultDrawDistance	1	1
 Disregard96DefaultDrawDistance	1	1
 RenderTextureMemoryMultiple		1	1.0
 SkyUseClassicClouds			1	1
+WatchdogDisabled				1	1
 
 //
 // Low Graphics Settings
diff --git a/indra/newview/featuretable_mac.txt b/indra/newview/featuretable_mac.txt
index 47033efc47046fa3f107b4367bd19c83784fac16..e89b0cc49d5f4514104a63c3d82874af1022f86d 100644
--- a/indra/newview/featuretable_mac.txt
+++ b/indra/newview/featuretable_mac.txt
@@ -59,6 +59,7 @@ RenderTextureMemoryMultiple		1	0.5
 Disregard128DefaultDrawDistance	1	1
 Disregard96DefaultDrawDistance	1	1
 SkyUseClassicClouds			1	1
+WatchdogDisabled				1	1
 
 //
 // Low Graphics Settings
diff --git a/indra/newview/featuretable_solaris.txt b/indra/newview/featuretable_solaris.txt
index 6edd2806865b09790bb834dcbfe0d0a0dcc974d4..0ae463332c532c9cb01f4efe88b9ce5411acb05c 100644
--- a/indra/newview/featuretable_solaris.txt
+++ b/indra/newview/featuretable_solaris.txt
@@ -37,6 +37,8 @@ VertexShaderEnable	1	1
 RenderTextureMemoryMultiple		1	1.0
 UseOcclusion		1       1
 RenderCubeMap		1       1
+WatchdogDisabled				1	1
+
 
 //
 // Class 0 Hardware (Unknown or just old)
diff --git a/indra/newview/llappviewer.cpp b/indra/newview/llappviewer.cpp
index 1ed63555b0780c2afc5611548ea0c8619af05c56..dc514eafe7798ff4b960673a90da59fc9515f362 100644
--- a/indra/newview/llappviewer.cpp
+++ b/indra/newview/llappviewer.cpp
@@ -81,7 +81,7 @@
 #include "llvoicechannel.h"
 #include "llvoavatarself.h"
 #include "llsidetray.h"
-
+#include "llfeaturemanager.h"
 
 #include "llweb.h"
 #include "llsecondlifeurls.h"
@@ -379,14 +379,8 @@ bool handleCrashSubmitBehaviorChanged(const LLSD& newvalue)
 	const S32 NEVER_SUBMIT_REPORT = 2;
 	if(cb == NEVER_SUBMIT_REPORT)
 	{
-// 		LLWatchdog::getInstance()->cleanup(); // SJB: cleaning up a running watchdog thread is unsafe
 		LLAppViewer::instance()->destroyMainloopTimeout();
 	}
-	else if(gSavedSettings.getBOOL("WatchdogEnabled") == TRUE)
-	{
-		// Don't re-enable the watchdog when we change the setting; this may get called before it's started
-// 		LLWatchdog::getInstance()->init();
-	}
 	return true;
 }
 
@@ -1689,14 +1683,6 @@ bool LLAppViewer::initThreads()
 	static const bool enable_threads = true;
 #endif
 
-	const S32 NEVER_SUBMIT_REPORT = 2;
-	bool use_watchdog = gSavedSettings.getBOOL("WatchdogEnabled");
-	bool send_reports = gCrashSettings.getS32(CRASH_BEHAVIOR_SETTING) != NEVER_SUBMIT_REPORT;
-	if(use_watchdog && send_reports)
-	{
-		LLWatchdog::getInstance()->init(watchdog_killer_callback);
-	}
-
 	LLVFSThread::initClass(enable_threads && false);
 	LLLFSThread::initClass(enable_threads && false);
 
@@ -1925,18 +1911,11 @@ bool LLAppViewer::initConfiguration()
 	}
 #endif
 
-	//*FIX:Mani - Set default to disabling watchdog mainloop 
-	// timeout for mac and linux. There is no call stack info 
-	// on these platform to help debug.
 #ifndef	LL_RELEASE_FOR_DOWNLOAD
-	gSavedSettings.setBOOL("WatchdogEnabled", FALSE);
 	gSavedSettings.setBOOL("QAMode", TRUE );
+	gSavedSettings.setS32("WatchdogEnabled", 0);
 #endif
-
-#ifndef LL_WINDOWS
-	gSavedSettings.setBOOL("WatchdogEnabled", FALSE);
-#endif
-
+	
 	gCrashSettings.getControl(CRASH_BEHAVIOR_SETTING)->getSignal()->connect(boost::bind(&handleCrashSubmitBehaviorChanged, _2));	
 
 	// These are warnings that appear on the first experience of that condition.
@@ -2364,6 +2343,25 @@ bool LLAppViewer::initWindow()
 		gSavedSettings.getS32("WindowWidth"), gSavedSettings.getS32("WindowHeight"),
 		FALSE, ignorePixelDepth);
 
+	// Need to load feature table before cheking to start watchdog.
+	const S32 NEVER_SUBMIT_REPORT = 2;
+	bool use_watchdog = false;
+	int watchdog_enabled_setting = gSavedSettings.getS32("WatchdogEnabled");
+	if(watchdog_enabled_setting == -1){
+		use_watchdog = !LLFeatureManager::getInstance()->isFeatureAvailable("WatchdogDisabled");
+	}
+	else
+	{
+		// The user has explicitly set this setting; always use that value.
+		use_watchdog = bool(watchdog_enabled_setting);
+	}
+
+	bool send_reports = gCrashSettings.getS32(CRASH_BEHAVIOR_SETTING) != NEVER_SUBMIT_REPORT;
+	if(use_watchdog && send_reports)
+	{
+		LLWatchdog::getInstance()->init(watchdog_killer_callback);
+	}
+
 	LLNotificationsUI::LLNotificationManager::getInstance();
 		
 	if (gSavedSettings.getBOOL("WindowMaximized"))
@@ -4133,7 +4131,7 @@ void LLAppViewer::forceErrorBreakpoint()
 void LLAppViewer::forceErrorBadMemoryAccess()
 {
     S32* crash = NULL;
-    *crash = 0xDEADBEEF;
+    *crash = 0xDEADBEEF;  
     return;
 }
 
diff --git a/indra/newview/llappviewerwin32.cpp b/indra/newview/llappviewerwin32.cpp
index e3ef04d03d6cea04c2dbe90f4f17df1d5f35cccb..8c9fd09dcbd29e99257701d1b570d8cf0ec55c0b 100644
--- a/indra/newview/llappviewerwin32.cpp
+++ b/indra/newview/llappviewerwin32.cpp
@@ -64,6 +64,10 @@
 #include "llcommandlineparser.h"
 #include "lltrans.h"
 
+#ifndef LL_RELEASE_FOR_DOWNLOAD
+#include "llwindebug.h"
+#endif
+
 // *FIX:Mani - This hack is to fix a linker issue with libndofdev.lib
 // The lib was compiled under VS2005 - in VS2003 we need to remap assert
 #ifdef LL_DEBUG
@@ -342,6 +346,10 @@ bool LLAppViewerWin32::init()
 	llinfos << "Turning off Windows error reporting." << llendl;
 	disableWinErrorReporting();
 
+#ifndef LL_RELEASE_FOR_DOWNLOAD
+	LLWinDebug::instance().init();
+#endif
+
 	return LLAppViewer::init();
 }
 
diff --git a/indra/newview/llwindebug.cpp b/indra/newview/llwindebug.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..502fefd4ef48659abad1a62f2800f9a337742335
--- /dev/null
+++ b/indra/newview/llwindebug.cpp
@@ -0,0 +1,188 @@
+/**
+ * @file llwindebug.cpp
+ * @brief Windows debugging functions
+ *
+ * $LicenseInfo:firstyear=2004&license=viewergpl$
+ *
+ * Copyright (c) 2004-2009, Linden Research, Inc.
+ *
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ *
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ *
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ *
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+#include "llviewerprecompiledheaders.h"
+
+#include "llwindebug.h"
+#include "lldir.h"
+
+
+// based on dbghelp.h
+typedef BOOL (WINAPI *MINIDUMPWRITEDUMP)(HANDLE hProcess, DWORD dwPid, HANDLE hFile, MINIDUMP_TYPE DumpType,
+									CONST PMINIDUMP_EXCEPTION_INFORMATION ExceptionParam,
+									CONST PMINIDUMP_USER_STREAM_INFORMATION UserStreamParam,
+									CONST PMINIDUMP_CALLBACK_INFORMATION CallbackParam
+									);
+
+MINIDUMPWRITEDUMP f_mdwp = NULL;
+
+
+class LLMemoryReserve {
+public:
+	LLMemoryReserve();
+	~LLMemoryReserve();
+	void reserve();
+	void release();
+protected:
+	unsigned char *mReserve;
+	static const size_t MEMORY_RESERVATION_SIZE;
+};
+
+LLMemoryReserve::LLMemoryReserve() :
+	mReserve(NULL)
+{
+};
+
+LLMemoryReserve::~LLMemoryReserve()
+{
+	release();
+}
+
+// I dunno - this just seemed like a pretty good value.
+const size_t LLMemoryReserve::MEMORY_RESERVATION_SIZE = 5 * 1024 * 1024;
+
+void LLMemoryReserve::reserve()
+{
+	if(NULL == mReserve)
+		mReserve = new unsigned char[MEMORY_RESERVATION_SIZE];
+};
+
+void LLMemoryReserve::release()
+{
+	delete [] mReserve;
+	mReserve = NULL;
+};
+
+static LLMemoryReserve gEmergencyMemoryReserve;
+
+
+LONG NTAPI vectoredHandler(PEXCEPTION_POINTERS exception_infop)
+{
+	LLWinDebug::instance().generateMinidump(exception_infop);
+	return EXCEPTION_CONTINUE_SEARCH;
+}
+
+// static
+void  LLWinDebug::init()
+{
+	static bool s_first_run = true;
+	// Load the dbghelp dll now, instead of waiting for the crash.
+	// Less potential for stack mangling
+
+	if (s_first_run)
+	{
+		// First, try loading from the directory that the app resides in.
+		std::string local_dll_name = gDirUtilp->findFile("dbghelp.dll", gDirUtilp->getWorkingDir(), gDirUtilp->getExecutableDir());
+
+		HMODULE hDll = NULL;
+		hDll = LoadLibraryA(local_dll_name.c_str());
+		if (!hDll)
+		{
+			hDll = LoadLibrary(L"dbghelp.dll");
+		}
+
+		if (!hDll)
+		{
+			LL_WARNS("AppInit") << "Couldn't find dbghelp.dll!" << LL_ENDL;
+		}
+		else
+		{
+			f_mdwp = (MINIDUMPWRITEDUMP) GetProcAddress(hDll, "MiniDumpWriteDump");
+
+			if (!f_mdwp)
+			{
+				FreeLibrary(hDll);
+				hDll = NULL;
+			}
+		}
+
+		gEmergencyMemoryReserve.reserve();
+
+		s_first_run = false;
+
+		// Add this exeption hanlder to save windows style minidump.
+		AddVectoredExceptionHandler(0, &vectoredHandler);
+	}
+}
+
+void LLWinDebug::writeDumpToFile(MINIDUMP_TYPE type, MINIDUMP_EXCEPTION_INFORMATION *ExInfop, const std::string& filename)
+{
+	if(f_mdwp == NULL || gDirUtilp == NULL)
+	{
+		return;
+	}
+	else
+	{
+		std::string dump_path = gDirUtilp->getExpandedFilename(LL_PATH_LOGS, filename);
+
+		HANDLE hFile = CreateFileA(dump_path.c_str(),
+									GENERIC_WRITE,
+									FILE_SHARE_WRITE,
+									NULL,
+									CREATE_ALWAYS,
+									FILE_ATTRIBUTE_NORMAL,
+									NULL);
+
+		if (hFile != INVALID_HANDLE_VALUE)
+		{
+			// Write the dump, ignoring the return value
+			f_mdwp(GetCurrentProcess(),
+					GetCurrentProcessId(),
+					hFile,
+					type,
+					ExInfop,
+					NULL,
+					NULL);
+
+			CloseHandle(hFile);
+		}
+
+	}
+}
+
+// static
+void LLWinDebug::generateMinidump(struct _EXCEPTION_POINTERS *exception_infop)
+{
+	std::string dump_path = gDirUtilp->getExpandedFilename(LL_PATH_LOGS,
+												"SecondLifeException");
+	if (exception_infop)
+	{
+		// Since there is exception info... Release the hounds.
+		gEmergencyMemoryReserve.release();
+
+		_MINIDUMP_EXCEPTION_INFORMATION ExInfo;
+
+		ExInfo.ThreadId = ::GetCurrentThreadId();
+		ExInfo.ExceptionPointers = exception_infop;
+		ExInfo.ClientPointers = NULL;
+		writeDumpToFile((MINIDUMP_TYPE)(MiniDumpWithDataSegs | MiniDumpWithIndirectlyReferencedMemory), &ExInfo, "SecondLife.dmp");
+	}
+}
diff --git a/indra/newview/llwindebug.h b/indra/newview/llwindebug.h
new file mode 100644
index 0000000000000000000000000000000000000000..809d1b8cc35efe9e51be1cdebf2cfd6e1282012b
--- /dev/null
+++ b/indra/newview/llwindebug.h
@@ -0,0 +1,49 @@
+/** 
+ * @file llwindebug.h
+ * @brief LLWinDebug class header file
+ *
+ * $LicenseInfo:firstyear=2004&license=viewergpl$
+ * 
+ * Copyright (c) 2004-2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLWINDEBUG_H
+#define LL_LLWINDEBUG_H
+
+#include "stdtypes.h"
+#include <dbghelp.h>
+
+class LLWinDebug:
+	public LLSingleton<LLWinDebug>
+{
+public:
+	static void init();
+	static void generateMinidump(struct _EXCEPTION_POINTERS *pExceptionInfo = NULL);
+private:
+	static void writeDumpToFile(MINIDUMP_TYPE type, MINIDUMP_EXCEPTION_INFORMATION *ExInfop, const std::string& filename);
+};
+
+#endif // LL_LLWINDEBUG_H
diff --git a/install.xml b/install.xml
index 39806a664d54d137566eeaab1674c984afc3ee3e..3795fc3757233ae9eb2b86ca4434758259c2e847 100644
--- a/install.xml
+++ b/install.xml
@@ -214,9 +214,9 @@
           <key>windows</key>
           <map>
             <key>md5sum</key>
-            <string>94fd43f534e2055858d524086384907d</string>
+            <string>72e6e2eff5d146a107f3059b6c31fb95</string>
             <key>url</key>
-            <uri>http://s3.amazonaws.com/viewer-source-downloads/install_pkgs/boost-1.39.0-windows-20100219.tar.bz2</uri>
+            <uri>http://s3.amazonaws.com/viewer-source-downloads/install_pkgs/boost-1.39.0-windows-20100630.tar.bz2</uri>
           </map>
         </map>
       </map>