(Following paragraphs copied from bug 116236 verbatim :-)
As mentioned in
http://developer.gnome.org/doc/tutorials/gnome-i18n/developer.html#plurals,
the common way of handling plurals is broken for many locales. A way to
solve this is by using ngettext instead, as mentioned in that document.

A simple code example of code using ngettext:

  g_printf (ngettext ("Found %d file.", "Found %d files.", nbr_of_files),
nbr_of_files);



These are the relevant messages.

#: libseahorse/seahorse-context.c:427
#, c-format
msgid "Loaded %d key pairs"

#: libseahorse/seahorse-context.c:448
#, c-format
msgid "Loaded %d keys"

#: libseahorse/seahorse-recipients.c:77
#, c-format
msgid "Selected %d not fully valid keys and %d fully valid keys"

#: src/main.c:136
#, c-format
msgid "Imported %d keys"


Each of these is trivial, except for "Selected %d not fully..." because
there are two occurrences of %d.