I think this is because, in default installation, KGpg searches for a
config file in $HOME/.gnupg named options, instead of gpg.conf, so that
you have to manually select a server everytime you download or upload a
key. If you tell KGpg to search in that same directory, it will
correctly find
*** This bug is a duplicate of bug 119263 ***
https://bugs.launchpad.net/bugs/119263
Thank you! The solution for the bug you referred to solved this problem,
too.
** This bug has been marked a duplicate of bug 119263
KGpg cannot select $HOME/.gnupg/gpg.conf
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