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);

This message is problematic in gnome-netstatus:

#: src/netstatus-dialog.c:125
#, c-format
msgid "%lu packets"


GNOME 2.6 is string frozen right now though, so you need approval both from
the release team and translators at gnome-i18n@ to fix this right now.