Description of problem:
system-config-date is giving a python backtrace from the timezone
code when run in ja_JP.UTF-8.

Version-Release number of selected component (if applicable):
system-config-date-1.9.1-1.fc8

How reproducible:
every time

Steps to Reproduce:
1. Japanese anaconda install 
2. LANG=ja_JP.UTF-8 system-config-date
  
Actual results:
1. anaconda backtrace:
Traceback (most recent call first):
  File "/usr/share/system-config-date/timezone_map_gui.py", line 275, in
currentCityLabel_set
    labelText = _('Selected city: %(city)s (%(comments)s)') % {'city':
self.cityname_format (self.currentEntry.tz), 'comments':
_(self.currentEntry.comments)}
  File "/usr/share/system-config-date/timezone_map_gui.py", line 582, in setCurrent
    self.currentCityLabel_set ()
  File "/usr/share/system-config-date/timezone_map_gui.py", line 333, in __init__
    self.setCurrent (zonetab.findEntryByTZ (default))
  File "/usr/lib/anaconda/iw/timezone_gui.py", line 77, in timezone_widget_create
    viewportWidth=viewportWidth)
  File "/usr/lib/anaconda/iw/timezone_gui.py", line 63, in custom_widget_handler
    return handler(str1, str2, int1, int2)
ValueError: unsupported format character '(' (0x28) at index 28

2. similar backtrace

Expected results:
no errors

Additional info:
Only seems to happen for Japanese - so looks like a translation issue.
(tested ko, zh and hi too)