I just thought I'd add what I have found so far.

The GnuPG manpage describes homedir and an environmental var one can set:

--homedir directory
Set the name of the home directory to directory If this option is not 
+used it defaults to "~/.gnupg". It does not make sense to use this in
+ a options file. This also overrides the environment variable "GNUPGH
+OME".

[download]

I tried setting GNUPGHOME to C:/Users/somia/.gnupg (which already exists; something along the line created that dir) ...but as stated above, it is overridden when some Perl code (in Module::Signature?) calls gpg. So keeping signature-checking off as Danny and others say, is the smart move until someone fixes this strange behavior. ;-/

In reply to Re^2: GPG-Signed modules fail to install using cpanp under CygwinPerl by Intrepid
in thread GPG-Signed modules fail to install using cpanp under CygwinPerl by Intrepid

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