Ok, it looks I've found the troublemaker part of configuration. There
are two separate folders with the same configuration file, though
slightly different entries:
MsVStd9\VC\bin\amd64\AMD64.VCPlatform.config
MsVStd9\VC\vcpackages\AMD64.VCPlatform.config

Why there are two of them, I have no clue, though the difference is as
follows:
1) <Platform Name="VCProjectAMD64Platform.dll" Identifier="x64">
<Directories Path="$(VCInstallDir)bin\amd64 ...

2) <Platform Name="VCProjectAMD64Platform.dll"
Identifier="{656d8763-2429-11d7-8bf6-00b0d03daa06}">

<Directories Path="$(VCInstallDir)bin\x86_amd64 ...


Now, if I amend the Identifier="{656d8763-2429-11d7-8bf6-00b0d03daa06}"
with anything else, the duplicate of x64 disappears!



Could any of you explain me why there are two profiles and what is this
confusing x86_amd64 folder for?

Cheers,
Peter.

> Now, if I amend the Identifier="{656d8763-2429-11d7-8bf6-00b0d03daa06}"

> with anything else, the duplicate of x64 disappears!
>
> Could any of you explain me why there are two profiles and what is this
> confusing x86_amd64 folder for?

OK, so this second configuration is meant for the cross-compiler which
is fair enough, though I run MsVC on Win XP x64. Why this second
configuration even got enabled in first place? How should I correctly
amend the Identifier entry so as not to mess up too much?

Thanks.