If you perform a custom Visual Studio 2010 installation selecting only C++ development tools on a clean Windows 7 x64 machine, running Tabs Studio v2.0 generates “System.IO.FileNotFoundException: Could not load file or assembly ‘stdole, Version=7.0.3300.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’ or one of its dependencies. The system cannot find the file specified.”

stdole FileNotFoundException
A workaround is to manually install stdole.dll in the GAC. For example, running the following single line command from an elevated command prompt:
"C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Bin\gacutil.exe" -i "C:\Program Files (x86)\Common Files\microsoft shared\MSEnv\PublicAssemblies\stdole.dll"

Installing stdole.dll in the GAC
Another workaround is to add Visual C# development tools in the Visual Studio 2010 installer:

The Visual C# installation option
Tabs Studio v2.0.0 public is released – comparing to v1.9.5 added a yellow tone to the selected unfocused tab background in VS 2010.
Tabs Studio v1.9.5 is released:
- Added the Tabs Studio toolbar to VS 2010.
- Added the “Show tabs in a separate window” option to VS 2010.
- Added close file buttons.
- Changed selected tab colors to match the default VS 2010 theme.
- Removed the XP quick style option in VS 2010.
- Removed the fixed expiration date for VS 2010.
- Fixed the rare unhandled exception when creating the Tabs Studio toolbar.
Yesterday Visual Studio 2010 was released:

Visual Studio 2010 Ultimate
I don’t see any changes in default VS tabs behavior comparing to RC. I’ve tested Tabs Studio v1.9.0 with VS Professional, Premium and Ultimate 2010 RTM editions and everything worked just fine.
I’ve changed selected tab colors to match the default VS 2010 theme – yellow for active, dark blue for inactive and grey for unfocused:

Active and inactive tabs

Unfocused tabs
I’ve added the close file button to each extension. It should be particularly useful in SSMS where you more often need to close a file rather than a whole tab:

Close file buttons in SSMS
In the default style these buttons are collapsed, but you can use all usual properties in a custom style to make them visible. For example, the following style makes close file buttons visible on the selected tab and hides the close tab button in a tab when it contains more than a one extension:
<Style TargetType="TabsStudio:TabExtensionCloseButton" BasedOn="{StaticResource DefaultTabExtensionCloseButton}">
<Style.Triggers>
<Trigger Property="IsTabSelected" Value="True">
<Setter Property="Visibility" Value="Visible"/>
</Trigger>
</Style.Triggers>
</Style>
<Style TargetType="TabsStudio:CloseTabButton" BasedOn="{StaticResource DefaultCloseTabButtonStyle}">
<Style.Triggers>
<Trigger Property="IsMultiExtensions" Value="True">
<Setter Property="Visibility" Value="Collapsed"/>
</Trigger>
</Style.Triggers>
</Style>