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-      <SubSystem>Console</SubSystem>
-      <OptimizeReferences>true</OptimizeReferences>
-      <EnableCOMDATFolding>true</EnableCOMDATFolding>
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+      <!-- for Release -->
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+      <EnableCOMDATFolding Condition="'$(Configuration)' == 'Release'">true</EnableCOMDATFolding>
+
+      <TargetMachine Condition="'$(Platform)' == 'Win32'">MachineX86</TargetMachine>
+      <TargetMachine Condition="'$(Platform)' == 'x64'">MachineX64</TargetMachine>
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
diff --git a/win32/vs10/gtk-update-icon-cache.vcxproj b/win32/vs10/gtk-update-icon-cache.vcxproj
index 567971b9cf..f6ea9eb54f 100644
--- a/win32/vs10/gtk-update-icon-cache.vcxproj
+++ b/win32/vs10/gtk-update-icon-cache.vcxproj
@@ -24,142 +24,61 @@
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-    <WholeProgramOptimization>true</WholeProgramOptimization>
-    <PlatformToolset>v100</PlatformToolset>
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-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+  <PropertyGroup Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <CharacterSet>MultiByte</CharacterSet>
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     <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
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-    <Import Project="..\vs1x-props\gtk3-build-defines.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
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     <Import Project="..\vs1x-props\gtk3-build-defines.props" />
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   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>
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-    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">false</LinkIncremental>
-    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</LinkIncremental>
-    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Release|x64'">false</LinkIncremental>
+    <LinkIncremental Condition="'$(Configuration)' == 'Debug'">true</LinkIncremental>
+    <LinkIncremental Condition="'$(Configuration)' == 'Release'">false</LinkIncremental>
   </PropertyGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <ClCompile>
-      <Optimization>Disabled</Optimization>
-      <AdditionalIncludeDirectories>$(BaseConfigIncludes);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
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-      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
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-      <WarningLevel>Level3</WarningLevel>
-      <DebugInformationFormat>EditAndContinue</DebugInformationFormat>
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-    <Link>
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-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-    <ClCompile>
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-      <PreprocessorDefinitions>%(PreprocessorDefinitions)</PreprocessorDefinitions>
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-      <TargetMachine>MachineX86</TargetMachine>
-    </Link>
-  </ItemDefinitionGroup>
-  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+  <ItemDefinitionGroup>
     <Midl>
-      <TargetEnvironment>X64</TargetEnvironment>
+      <TargetEnvironment Condition="'$(Platform)'  ==  'x64'">X64</TargetEnvironment>
     </Midl>
     <ClCompile>
-      <Optimization>Disabled</Optimization>
       <AdditionalIncludeDirectories>$(BaseConfigIncludes);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
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-      <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
-      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
-      <PrecompiledHeader>
-      </PrecompiledHeader>
+      <PrecompiledHeader></PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
-      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+
+      <!-- for Debug -->
+      <Optimization Condition="'$(Configuration)' == 'Debug'">Disabled</Optimization>
+      <PreprocessorDefinitions Condition="'$(Configuration)' == 'Debug'">_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <MinimalRebuild Condition="'$(Configuration)' == 'Debug'">true</MinimalRebuild>
+      <BasicRuntimeChecks Condition="'$(Configuration)' == 'Debug'">EnableFastChecks</BasicRuntimeChecks>
+      <RuntimeLibrary Condition="'$(Configuration)' == 'Debug'">MultiThreadedDebugDLL</RuntimeLibrary>
+      <DebugInformationFormat Condition="'$(Configuration)|$(Platform)' == 'Debug|Win32'">EditAndContinue</DebugInformationFormat>
+      <DebugInformationFormat Condition="'$(Configuration)|$(Platform)' == 'Debug|x64'">ProgramDatabase</DebugInformationFormat>
+
+      <!-- for Release -->
+      <Optimization Condition="'$(Configuration)' == 'Release'">MaxSpeed</Optimization>
+      <IntrinsicFunctions Condition="'$(Configuration)' == 'Release'">true</IntrinsicFunctions>
+      <PreprocessorDefinitions Condition="'$(Configuration)' == 'Release'">%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <RuntimeLibrary Condition="'$(Configuration)' == 'Release'">MultiThreadedDLL</RuntimeLibrary>
+      <FunctionLevelLinking Condition="'$(Configuration)' == 'Release'">true</FunctionLevelLinking>
+      <DebugInformationFormat Condition="'$(Configuration)' == 'Release'">ProgramDatabase</DebugInformationFormat>
     </ClCompile>
     <Link>
       <AdditionalDependencies>%(AdditionalDependencies)</AdditionalDependencies>
       <GenerateDebugInformation>true</GenerateDebugInformation>
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-      <SubSystem>Console</SubSystem>
-      <OptimizeReferences>true</OptimizeReferences>
-      <EnableCOMDATFolding>true</EnableCOMDATFolding>
-      <TargetMachine>MachineX64</TargetMachine>
+
+      <!-- for Release -->
+      <OptimizeReferences Condition="'$(Configuration)' == 'Release'">true</OptimizeReferences>
+      <EnableCOMDATFolding Condition="'$(Configuration)' == 'Release'">true</EnableCOMDATFolding>
+
+      <TargetMachine Condition="'$(Platform)' == 'Win32'">MachineX86</TargetMachine>
+      <TargetMachine Condition="'$(Platform)' == 'x64'">MachineX64</TargetMachine>
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   </ItemDefinitionGroup>
   <ItemGroup>
diff --git a/win32/vs10/gtk3-install.vcxproj b/win32/vs10/gtk3-install.vcxproj
index 0409671572..588515d8aa 100644
--- a/win32/vs10/gtk3-install.vcxproj
+++ b/win32/vs10/gtk3-install.vcxproj
@@ -40,46 +40,7 @@
     <Keyword>Win32Proj</Keyword>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
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-    <CharacterSet>MultiByte</CharacterSet>
-    <WholeProgramOptimization>true</WholeProgramOptimization>
-    <PlatformToolset>v100</PlatformToolset>
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-    <CharacterSet>MultiByte</CharacterSet>
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-    <CharacterSet>MultiByte</CharacterSet>
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-    <CharacterSet>MultiByte</CharacterSet>
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-    <CharacterSet>MultiByte</CharacterSet>
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-    <PlatformToolset>v100</PlatformToolset>
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-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug_Broadway|x64'" Label="Configuration">
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     <CharacterSet>MultiByte</CharacterSet>
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   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
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-    <Import Project="..\vs1x-props\gtk3-build-defines.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug_Broadway|x64'" Label="PropertySheets">
+  <ImportGroup Label="PropertySheets">
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diff --git a/win32/vs10/gtk3-introspect.vcxproj b/win32/vs10/gtk3-introspect.vcxproj
index 7905684ed2..1a4409aa16 100644
--- a/win32/vs10/gtk3-introspect.vcxproj
+++ b/win32/vs10/gtk3-introspect.vcxproj
@@ -23,69 +23,20 @@
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   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
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-    <CharacterSet>MultiByte</CharacterSet>
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-    <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v100</PlatformToolset>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+  <PropertyGroup Label="Configuration">
     <ConfigurationType>Makefile</ConfigurationType>
     <CharacterSet>MultiByte</CharacterSet>
     <PlatformToolset>v100</PlatformToolset>
   </PropertyGroup>
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-    <Import Project="..\vs1x-props\gtk3-build-defines.props" />
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+  <ImportGroup Label="PropertySheets">
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-    <NMakeCleanCommandLine>$(GtkIntrospectNMakeCmd) $(IntrospectPythonParam) introspect-clean</NMakeCleanCommandLine>
-    <NMakeOutput>$(GtkIntrospectBuiltFiles)</NMakeOutput>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+  <PropertyGroup>
     <NMakeBuildCommandLine>$(GtkIntrospectNMakeCmd) $(IntrospectPythonParam) introspect</NMakeBuildCommandLine>
     <NMakeReBuildCommandLine>$(GtkIntrospectNMakeCmd) $(IntrospectPythonParam) introspect-clean introspect</NMakeReBuildCommandLine>
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@@ -104,4 +55,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/win32/vs10/gtk3-prebuild.vcxproj b/win32/vs10/gtk3-prebuild.vcxproj
index dc3136275f..a0b5829ae8 100644
--- a/win32/vs10/gtk3-prebuild.vcxproj
+++ b/win32/vs10/gtk3-prebuild.vcxproj
@@ -40,46 +40,7 @@
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   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
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-    <CharacterSet>MultiByte</CharacterSet>
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-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug_Broadway|Win32'" Label="Configuration">
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-    <CharacterSet>MultiByte</CharacterSet>
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-    <PlatformToolset>v100</PlatformToolset>
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-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug_Broadway|x64'" Label="Configuration">
+  <PropertyGroup Label="Configuration">
     <ConfigurationType>Makefile</ConfigurationType>
     <CharacterSet>MultiByte</CharacterSet>
     <PlatformToolset>v100</PlatformToolset>
@@ -87,52 +48,31 @@
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-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug_Broadway|x64'" Label="PropertySheets">
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-    <NMakeBuildCommandLine Condition="'$(Configuration)' == 'Release_Broadway'">$(GenerateRequiredSourcesBase) CFG=Release BROADWAY=1 $(IntrospectPythonParam) generate-base-sources</NMakeBuildCommandLine>
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     <NMakeBuildCommandLine Condition="'$(Configuration)' == 'Debug'">$(GenerateRequiredSourcesBase) CFG=$(Configuration) $(IntrospectPythonParam) generate-base-sources</NMakeBuildCommandLine>
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     <NMakeCleanCommandLine Condition="'$(Configuration)' == 'Debug'">$(GenerateRequiredSourcesBase) CFG=$(Configuration) $(IntrospectPythonParam) clean</NMakeCleanCommandLine>
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     <NMakeCleanCommandLine Condition="'$(Configuration)' == 'Release'">$(GenerateRequiredSourcesBase) CFG=$(Configuration) $(IntrospectPythonParam) clean</NMakeCleanCommandLine>
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+    <NMakeReBuildCommandLine Condition="'$(Configuration)' == 'Debug_Broadway'">$(GenerateRequiredSourcesBase) CFG=Debug BROADWAY=1 $(IntrospectPythonParam) clean generate-base-sources</NMakeReBuildCommandLine>
+    <NMakeCleanCommandLine Condition="'$(Configuration)' == 'Debug_Broadway'">$(GenerateRequiredSourcesBase) CFG=Debug BROADWAY=1 $(IntrospectPythonParam) clean</NMakeCleanCommandLine>
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+    <NMakeReBuildCommandLine Condition="'$(Configuration)' == 'Release_Broadway'">$(GenerateRequiredSourcesBase) CFG=Release BROADWAY=1 $(IntrospectPythonParam) clean generate-base-sources</NMakeReBuildCommandLine>
+    <NMakeCleanCommandLine Condition="'$(Configuration)' == 'Release_Broadway'">$(GenerateRequiredSourcesBase) CFG=Release BROADWAY=1 $(IntrospectPythonParam) clean</NMakeCleanCommandLine>
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