diff --git a/build/SourceLink.props b/build/SourceLink.props
index e27727c9e8..1e007e01eb 100644
--- a/build/SourceLink.props
+++ b/build/SourceLink.props
@@ -1,5 +1,26 @@
 <Project>
+  <PropertyGroup>
+    <PublishRepositoryUrl>true</PublishRepositoryUrl>
+    <IncludeSymbols>false</IncludeSymbols>
+    <EmbedUntrackedSources>true</EmbedUntrackedSources>
+    <DebugType>embedded</DebugType>
+    <AllowedOutputExtensionsInPackageBuildOutputFolder>$(AllowedOutputExtensionsInPackageBuildOutputFolder);.pdb</AllowedOutputExtensionsInPackageBuildOutputFolder>
+  </PropertyGroup>
+  
+  <PropertyGroup Condition="'$(TF_BUILD)' == 'true'">
+    <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
+  </PropertyGroup>
+  
+  <PropertyGroup Condition="'$(GITHUB_ACTIONS)' == 'true'">
+    <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
+  </PropertyGroup>
+  
   <ItemGroup>
-    <PackageReference Include="SourceLink.Create.CommandLine" Version="2.8.3" PrivateAssets="All" />
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All"/>
+  </ItemGroup>
+
+  <!-- Workaround for https://github.com/dotnet/sdk/issues/11105 -->
+  <ItemGroup>
+    <SourceRoot Include="$(NuGetPackageRoot)" Condition="'$(NuGetPackageRoot)' != ''" />
   </ItemGroup>
 </Project>
diff --git a/packages/Avalonia/Avalonia.csproj b/packages/Avalonia/Avalonia.csproj
index 75ee4a05cb..44e2290a0d 100644
--- a/packages/Avalonia/Avalonia.csproj
+++ b/packages/Avalonia/Avalonia.csproj
@@ -6,7 +6,9 @@
 
   <ItemGroup>
       <ProjectReference Include="../../src/Avalonia.Remote.Protocol/Avalonia.Remote.Protocol.csproj" />
-      <ProjectReference Include="../../src/Avalonia.Build.Tasks/Avalonia.Build.Tasks.csproj" />
+      <ProjectReference Include="../../src/Avalonia.Build.Tasks/Avalonia.Build.Tasks.csproj" >
+        <PrivateAssets>all</PrivateAssets>
+      </ProjectReference>  
   </ItemGroup>
 
   <PropertyGroup>
@@ -29,21 +31,23 @@
       </_PackageFiles>
     </ItemGroup>
   </Target>
+  
   <ItemGroup>
     <Content Include="*.props">
        <Pack>true</Pack>
-       <PackagePath>build\</PackagePath>
+       <PackagePath>build\;buildTransitive\</PackagePath>
     </Content>
     <Content Include="*.targets">
       <Pack>true</Pack>
-      <PackagePath>build\</PackagePath>
+      <PackagePath>build\;buildTransitive\</PackagePath>
     </Content>
     <Content Include="AvaloniaItemSchema.xaml">
       <Pack>true</Pack>
-      <PackagePath>build\</PackagePath>
+      <PackagePath>build\;buildTransitive\</PackagePath>
     </Content>
   </ItemGroup>
   <Import Project="..\..\build\SharedVersion.props" />
   <Import Project="..\..\build\NetFX.props" />
   <Import Project="..\..\build\CoreLibraries.props" />
+  <Import Project="..\..\build\SourceLink.props" Condition="'$(DisableSourceLink)' == ''" />
 </Project>
diff --git a/src/Avalonia.Base/Avalonia.Base.csproj b/src/Avalonia.Base/Avalonia.Base.csproj
index 9bfd387ca9..0470dbfe89 100644
--- a/src/Avalonia.Base/Avalonia.Base.csproj
+++ b/src/Avalonia.Base/Avalonia.Base.csproj
@@ -5,9 +5,6 @@
     <RootNamespace>Avalonia</RootNamespace>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>    
   </PropertyGroup>
-  <ItemGroup>
-    <ProjectReference Include="..\Avalonia.Build.Tasks\Avalonia.Build.Tasks.csproj"/>
-  </ItemGroup>
   <Import Project="..\..\build\Base.props" />
   <Import Project="..\..\build\Binding.props" />
   <Import Project="..\..\build\Rx.props" />
diff --git a/src/Avalonia.Controls/Platform/DefaultMenuInteractionHandler.cs b/src/Avalonia.Controls/Platform/DefaultMenuInteractionHandler.cs
index 5cbd3698b6..e3e9e84d7e 100644
--- a/src/Avalonia.Controls/Platform/DefaultMenuInteractionHandler.cs
+++ b/src/Avalonia.Controls/Platform/DefaultMenuInteractionHandler.cs
@@ -355,7 +355,13 @@ namespace Avalonia.Controls.Platform
                 }
                 else if (!item.IsPointerOverSubMenu)
                 {
-                    item.IsSubMenuOpen = false;
+                    DelayRun(() =>
+                    {
+                        if (!item.IsPointerOverSubMenu)
+                        {
+                            item.IsSubMenuOpen = false;
+                        }
+                    }, MenuShowDelay);
                 }
             }
         }
diff --git a/src/Avalonia.Dialogs/AboutAvaloniaDialog.xaml b/src/Avalonia.Dialogs/AboutAvaloniaDialog.xaml
index e51cc2f3ce..c5e1d43d80 100644
--- a/src/Avalonia.Dialogs/AboutAvaloniaDialog.xaml
+++ b/src/Avalonia.Dialogs/AboutAvaloniaDialog.xaml
@@ -79,8 +79,8 @@
         <DrawingPresenter Drawing="{DynamicResource AvaloniaLogo}" />
       </Border>
       <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center" Margin="10,-10,0,0">
-        <TextBlock Text="Avalonia 0.9" FontSize="40" Foreground="White" />
-        <TextBlock Text="Development Build" Margin="0,-10,0,0" FontSize="15" Foreground="White" />
+        <TextBlock Text="{Binding Version, StringFormat=Avalonia {0}}" FontSize="40" Foreground="White" />
+        <TextBlock Text="Development Build" IsVisible="{Binding IsDevelopmentBuild}" Margin="0,-10,0,0" FontSize="15" Foreground="White" />
       </StackPanel>
     </StackPanel>
     <StackPanel HorizontalAlignment="Stretch" VerticalAlignment="Center" Spacing="20" Margin="10 60 10 0">
@@ -102,4 +102,4 @@
       <TextBlock Text="© 2020 The Avalonia Project" TextWrapping="Wrap" HorizontalAlignment="Center" />
     </StackPanel>
   </Grid>
-</Window>
\ No newline at end of file
+</Window>
diff --git a/src/Avalonia.Dialogs/AboutAvaloniaDialog.xaml.cs b/src/Avalonia.Dialogs/AboutAvaloniaDialog.xaml.cs
index 09fab0ed3f..55e30396e1 100644
--- a/src/Avalonia.Dialogs/AboutAvaloniaDialog.xaml.cs
+++ b/src/Avalonia.Dialogs/AboutAvaloniaDialog.xaml.cs
@@ -1,3 +1,4 @@
+using System;
 using System.Diagnostics;
 using System.Runtime.InteropServices;
 using Avalonia.Controls;
@@ -7,12 +8,18 @@ namespace Avalonia.Dialogs
 {
     public class AboutAvaloniaDialog : Window
     {
+        private static readonly Version s_version = typeof(AboutAvaloniaDialog).Assembly.GetName().Version;
+
+        public static string Version { get; } = s_version.ToString(2);
+
+        public static bool IsDevelopmentBuild { get; } = s_version.Revision == 999;
+
         public AboutAvaloniaDialog()
         {
             AvaloniaXamlLoader.Load(this);
             DataContext = this;
         }
- 
+
         public static void OpenBrowser(string url)
         {
             if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
diff --git a/src/Avalonia.Themes.Default/CaptionButtons.xaml b/src/Avalonia.Themes.Default/CaptionButtons.xaml
index 95967547c6..cf469eeac5 100644
--- a/src/Avalonia.Themes.Default/CaptionButtons.xaml
+++ b/src/Avalonia.Themes.Default/CaptionButtons.xaml
@@ -57,7 +57,7 @@
   <Style Selector="CaptionButtons:maximized Panel#PART_RestoreButton Path">
     <Setter Property="Data" Value="M2048 410h-410v-410h-1638v1638h410v410h1638v-1638zM1434 1434h-1229v-1229h1229v1229zM1843 1843h-1229v-205h1024v-1024h205v1229z" />
   </Style>
-  <Style Selector="CaptionButtons Panel#PART_FullScreenButton Path">
+  <Style Selector="CaptionButtons Panel#PART_FullScreenButton">
     <Setter Property="IsVisible" Value="False" />
   </Style>
   <Style Selector="CaptionButtons Panel#PART_FullScreenButton Path">
diff --git a/src/Avalonia.Themes.Fluent/Controls/CaptionButtons.xaml b/src/Avalonia.Themes.Fluent/Controls/CaptionButtons.xaml
index 1f8887c283..82cdc4135d 100644
--- a/src/Avalonia.Themes.Fluent/Controls/CaptionButtons.xaml
+++ b/src/Avalonia.Themes.Fluent/Controls/CaptionButtons.xaml
@@ -56,7 +56,7 @@
   <Style Selector="CaptionButtons:maximized Panel#PART_RestoreButton Path">
     <Setter Property="Data" Value="M2048 410h-410v-410h-1638v1638h410v410h1638v-1638zM1434 1434h-1229v-1229h1229v1229zM1843 1843h-1229v-205h1024v-1024h205v1229z" />
   </Style>
-  <Style Selector="CaptionButtons Panel#PART_FullScreenButton Path">
+  <Style Selector="CaptionButtons Panel#PART_FullScreenButton">
     <Setter Property="IsVisible" Value="False" />
   </Style>
   <Style Selector="CaptionButtons Panel#PART_FullScreenButton Path">
diff --git a/src/Shared/PlatformSupport/StandardRuntimePlatform.cs b/src/Shared/PlatformSupport/StandardRuntimePlatform.cs
index d574732e3d..8521a50087 100644
--- a/src/Shared/PlatformSupport/StandardRuntimePlatform.cs
+++ b/src/Shared/PlatformSupport/StandardRuntimePlatform.cs
@@ -49,12 +49,20 @@ namespace Avalonia.Shared.PlatformSupport
             
             public UnmanagedBlob(StandardRuntimePlatform plat, int size)
             {
-                if (size <= 0)
-                    throw new ArgumentException("Positive number required", nameof(size));
-                _plat = plat;
-                _address = plat.Alloc(size);
-                GC.AddMemoryPressure(size);
-                Size = size;
+                try
+                {
+                    if (size <= 0)
+                        throw new ArgumentException("Positive number required", nameof(size));
+                    _plat = plat;
+                    _address = plat.Alloc(size);
+                    GC.AddMemoryPressure(size);
+                    Size = size;
+                }
+                catch
+                {
+                    GC.SuppressFinalize(this);
+                    throw;
+                }
 #if DEBUG
                 _backtrace = Environment.StackTrace;
                 lock (_btlock)