Yet another clarification:
[snip]
(4) Did not work for me: build R on D:
--- a Vista / Windows 7 issue?
In the end I succeeded with my build on drive C: (NTFS formatted)
giving the current user full access privileges to the installation
folders; before, in order to circumvent these privilege issues,
I tried building R on a different drive (D:) which in my case is
formatted as FAT32; somehow I got stuck with this, though;
(my Rtools are on C:). Is this a known issue /can you reproduce this?
I build R and packages on d:/ without any problems. I do not think that
the drive letter is the issues here. It may be some new MS security
policy on FAT drives - or whatever. I have not used FAT formatted drives
for serious work for at least a decade now.
At the end of the day, after having set the "right" TMPDIR environment
variable and copied the Tcl folder as indicated in R-admin.html,
it was /not/ a FAT32 issue: I managed to build it now on D:\
(although I agree with Uwe that this is probably not what you want to
do if NTFS works...)