note: On my computer I've had both VS2010, VS2012 and now I have VS2013 installed.
In my c# project we use the Microsoft.mshtml.dll file. Now there are no problems during development, but when I'm about to create my Setup with Installsheild LE it complains that it can't find the file c:\Program Files (x86)\Microsoft Visual Studio 11.0\Visual Studio Tools for Office\PIA\Common\Microsoft.mshtml.dll. And looking at my disk that's correct, there are no such file.
Now looking in the Add reference view the tool-tip for that dll says the same path but with 10.0 instead of 11.0. And that file actually exist.
I have also looked in my 12.0 folder, and also there the dll exist.
I'm guessing that something is messed up in my GAC (where it's also is located) or some other thing that makes it look in the wrong place. But I can't figure out where and what.
(I have tried to just copy the file from the 12.0 folder to the 11.0 folder, and that actually works. However that seem a little wrong in some way.)