I'm not completly sure, but...
There are some timezones in the Anaconda's POT file which should be translated
(generated from zone.tab). But timezones are taken from
system-config-date/timezones POT file (like the screen for timezone config where
Anaconda is taking translations from system-config-date and timezone list from
system-config-date/timezones). This seems to me like Anaconda's POT file contain
old timezone list (in zone.tab).
Please check it out and remove unneded strings for translation if the complete
timezone selection is now from system-config-date package.
Also consider to commit translations and rebuild system-config-date by
daily/weekly basis to allow translations to appear in the devel tree (to allow
to test them by Fedora translators in the test cycle for FC7).
The strings were being included from /usr/share/zoneinfo/zone.tab for text mode
installs but we can easily get around having that by just including the
system-config-date .mo files in the text environment. This will be fixed in the
next build of anaconda.