While creating the 1_ resources in Tx I found problems with plural forms in rpmdrake/es.po.
Please check and correct those translations.
The source strings are
msgid "The following package is going to be installed:"
msgid_plural "The following %d packages are going to be installed:"
msgid "Remove one package?"
msgid_plural "Remove %d packages?"
Ping spanish i18n team
Must have been fixed, since es.po does pass msgfmt -c now (in trunk and 1/ branch).