[R] Installation issue R 2.6.1

[jefe goode]

I am seeing a peculiar installation problem with the R
installation files for Windows:

R2.6.1 fails to install on MS-Vista with a file
corruption issue.

But, the same R2.6.1 exe does install OK on Windows
ME.

The same problem exists with R2.3.1:
Fails to install on Windows Vista
Succeeds install on Windows ME
Succeeds install on Windows 2000 and Windows 98

so it cannot be the installation file.

Has anyone seen this issue with Windows Vista?

Regards

Jefe