At the beginning of August 2009, Microsoft issued a security patch KB971090 on its Microsoft Visual Studio 2005 product: the result was that when we recompiled our plugin with this updated Studio, it would not run on other PCs...

Hopefully, some smart people suggested four solutions:

Install the vc_redist.exe to be found in c:\Program Files\Microsoft Visual Studio 
8\SDK\v2.0\BootStrapper\Packages\vcredist_x86 on every customer's PC. Not very convenient.

Remove the security fix KB971090. This is what we did.

Some other people like Ted, proposes a method to force the use of build 762 (the previous version used by Visual Studio 2005) but we could not make this work properly.

Finally, it was also suggested to ship this 4053 build as private assemblies. We ran into other isses that
are detailed below.

NO, no, see, you're doing it wrong.