I posted an issue a while back:
https://stackoverflow.com/questions/16123872/visual-c-runtime-8-0-50727-6910-merge-module
where I had an issue that I could find a particular version of a merge module.
I have since attempted to reinstall SP1 of both Visual Studio 2005 and 2008, and the merge modules for both runtimes (8 and 9) are not correctly being updated in (C:\Program Files (x86)\Common Files\Merge Modules). The only VC merge modules there are the original 8 and 9 modules.
I am running Windows 8 Enterprise x64. Does anyone know any of any issues with VC8/9 merge modules not being updated correctly through the Visual Studio update process on Windows 8?