diff --git a/indra/llimage/llimagej2c.cpp b/indra/llimage/llimagej2c.cpp
index 63d06e338..b39ae0c04 100644
--- a/indra/llimage/llimagej2c.cpp
+++ b/indra/llimage/llimagej2c.cpp
@@ -363,8 +363,12 @@ S32 LLImageJ2C::calcHeaderSizeJ2C()
 	return FIRST_PACKET_SIZE; // Hack. just needs to be >= actual header size...
 }
 
-static S32 cald_data_size_help(S32 w, S32 h, S32 comp, S32 discard_level, F32 rate)
+//static
+S32 LLImageJ2C::calcDataSizeJ2C(S32 w, S32 h, S32 comp, S32 discard_level, F32 rate)
 {
+	// Note: this only provides an *estimate* of the size in bytes of an image level
+	// *TODO: find a way to read the true size (when available) and convey the fact
+	// that the result is an estimate in the other cases
 	if (rate <= 0.f) rate = .125f;
 	while (discard_level > 0)
 	{
@@ -375,22 +379,7 @@ static S32 cald_data_size_help(S32 w, S32 h, S32 comp, S32 discard_level, F32 ra
 		discard_level--;
 	}
 	S32 bytes = (S32)((F32)(w*h*comp)*rate);
-	return bytes;
-}
-
-
-//static
-S32 LLImageJ2C::calcDataSizeJ2C(S32 w, S32 h, S32 comp, S32 discard_level, F32 rate)
-{
-	static const LLCachedControl<F32> exponent("SianaJ2CSizeExponent", 1.0f);
-	static const LLCachedControl<S32> offset("SianaJ2CSizeOffset", 0);
-	S32 size = cald_data_size_help(w, h, comp, discard_level, rate);
-	S32 size_d0 = cald_data_size_help(w, h, comp, 0, rate);
-
-	llassert_always(size_d0);
-	S32 bytes = size_d0*pow((double)size/size_d0, (double)exponent) + offset;
-	bytes = llmax (0, bytes - 600);
-	bytes = ((bytes + (1000 - 1))/1000)*1000 + 600;
+	bytes = llmax(bytes, calcHeaderSizeJ2C());
 	return bytes;
 }
 
diff --git a/indra/llplugin/slplugin/slplugin.cpp b/indra/llplugin/slplugin/slplugin.cpp
index 90ca3fea7..04662cf24 100644
--- a/indra/llplugin/slplugin/slplugin.cpp
+++ b/indra/llplugin/slplugin/slplugin.cpp
@@ -124,9 +124,14 @@ BOOL PreventSetUnhandledExceptionFilter()
 
 	newJump[ 0 ] = 0xE9;  // JMP absolute
 	memcpy( &newJump[ 1 ], &dwRelativeAddr, sizeof( pNewFunc ) );
-	SIZE_T bytesWritten;
-	BOOL bRet = WriteProcessMemory( GetCurrentProcess(), pOrgEntry, newJump, sizeof( pNewFunc ) + 1, &bytesWritten );
-	return bRet;
+	//SIZE_T bytesWritten;
+	//BOOL bRet = WriteProcessMemory( GetCurrentProcess(), pOrgEntry, newJump, sizeof( pNewFunc ) + 1, &bytesWritten );
+	DWORD oldProtect;
+	BOOL bRet = VirtualProtect(pOrgEntry, sizeof(pNewFunc) + 1, PAGE_READWRITE, &oldProtect);
+	if (!bRet) return FALSE;
+	memcpy(pOrgEntry, newJump, sizeof(pNewFunc) + 1);
+	VirtualProtect(pOrgEntry, sizeof(pNewFunc) + 1, oldProtect, &oldProtect);
+	return TRUE;
 #else
 	return FALSE;
 #endif
diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index 64fd98527..5a877e72a 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -278,29 +278,6 @@
     </array>
   </map>
 
-	<key>SianaJ2CSizeExponent</key>
-	<map>
-		<key>Comment</key>
-		<string>Exponent of size estimator. Should be between 0.0 and 1.0</string>
-		<key>Persist</key>
-		<integer>1</integer>
-		<key>Type</key>
-		<string>F32</string>
-		<key>Value</key>
-		<real>1.0</real>
-	</map>
-	<key>SianaJ2CSizeOffset</key>
-	<map>
-		<key>Comment</key>
-		<string>Number of bytes to add to size estimator.</string>
-		<key>Persist</key>
-		<integer>1</integer>
-		<key>Type</key>
-		<string>S32</string>
-		<key>Value</key>
-		<integer>0</integer>
-	</map>
-
 	<key>SianaLegacyJ2CSize</key>
 	<map>
 		<key>Comment</key>
diff --git a/indra/newview/llprefsvoice.cpp b/indra/newview/llprefsvoice.cpp
index e45a9c2c2..b009dff6d 100644
--- a/indra/newview/llprefsvoice.cpp
+++ b/indra/newview/llprefsvoice.cpp
@@ -114,7 +114,7 @@ BOOL LLPrefsVoice::postBuild()
 	childSetCommitCallback("enable_voice_check", onCommitEnableVoiceChat, this);
 	childSetAction("set_voice_hotkey_button", onClickSetKey, this);
 	childSetAction("set_voice_middlemouse_button", onClickSetMiddleMouse, this);
-	childSetAction("device_settings_btn", onClickVoiceDeviceSettings, NULL);
+	childSetAction("device_settings_btn", onClickVoiceDeviceSettings, this);
 
 	BOOL voice_disabled = gSavedSettings.getBOOL("CmdLineDisableVoice");
 	childSetVisible("voice_unavailable", voice_disabled);
diff --git a/indra/newview/llwindebug.cpp b/indra/newview/llwindebug.cpp
index 5c7ee642d..9b6ae853f 100644
--- a/indra/newview/llwindebug.cpp
+++ b/indra/newview/llwindebug.cpp
@@ -690,31 +690,6 @@ LPTOP_LEVEL_EXCEPTION_FILTER WINAPI MyDummySetUnhandledExceptionFilter(
 	return gFilterFunc;
 }
 
-BOOL PreventSetUnhandledExceptionFilter()
-{
-	HMODULE hKernel32 = LoadLibrary(_T("kernel32.dll"));
-	if (hKernel32 == NULL) 
-		return FALSE;
-
-	void *pOrgEntry = GetProcAddress(hKernel32, "SetUnhandledExceptionFilter");
-	if(pOrgEntry == NULL) 
-		return FALSE;
-	
-	unsigned char newJump[ 100 ];
-	DWORD dwOrgEntryAddr = (DWORD)pOrgEntry;
-	dwOrgEntryAddr += 5; // add 5 for 5 op-codes for jmp far
-	void *pNewFunc = &MyDummySetUnhandledExceptionFilter;
-	DWORD dwNewEntryAddr = (DWORD) pNewFunc;
-	DWORD dwRelativeAddr = dwNewEntryAddr - dwOrgEntryAddr;
-
-	newJump[ 0 ] = 0xE9;  // JMP absolute
-	memcpy(&newJump[ 1 ], &dwRelativeAddr, sizeof(pNewFunc));
-	SIZE_T bytesWritten;
-	BOOL bRet = WriteProcessMemory(GetCurrentProcess(),
-	pOrgEntry, newJump, sizeof(pNewFunc) + 1, &bytesWritten);
-	return bRet;
-}
-
 // static
 void  LLWinDebug::initExceptionHandler(LPTOP_LEVEL_EXCEPTION_FILTER filter_func)
 {
@@ -765,9 +740,6 @@ void  LLWinDebug::initExceptionHandler(LPTOP_LEVEL_EXCEPTION_FILTER filter_func)
     LPTOP_LEVEL_EXCEPTION_FILTER prev_filter;
 	prev_filter = SetUnhandledExceptionFilter(filter_func);
 
-	// *REMOVE:Mani
-	//PreventSetUnhandledExceptionFilter();
-
 	if(prev_filter != gFilterFunc)
 	{
 		LL_WARNS("AppInit")