Description of problem:
I set up the Japanese keyboard layout by following the steps provided here:
http://www.localizingjapan.com/blog/2012/06/08/japanese-input-on-fedora-17-linux-beefy-miracle-gnome-3/

And rebooted my system. The error appeared after I logged back in.

Version-Release number of selected component:
ibus-anthy-1.5.0-1.fc17

Additional info:
cmdline:        /usr/bin/python /usr/share/ibus-anthy/engine/main.py --ibus
executable:     /usr/share/ibus-anthy/engine/main.py
kernel:         3.8.4-102.fc17.i686
uid:            1000
ureports_counter: 1

Truncated backtrace:
engine.py:1854:_mk_key:ValueError: unichr() arg not in range(0x110000) (wide Python build)

Traceback (most recent call last):
  File "/usr/share/ibus-anthy/engine/factory.py", line 68, in __config_value_changed_cb
    engine.Engine.CONFIG_VALUE_CHANGED(self.__bus, section, name, value)
  File "/usr/share/ibus-anthy/engine/engine.py", line 1633, in CONFIG_VALUE_CHANGED
    cls.__keybind.setdefault(cls._s_to_key(s), []).append(cmd)
  File "/usr/share/ibus-anthy/engine/engine.py", line 1683, in _s_to_key
    return cls._mk_key(keyval, state)
  File "/usr/share/ibus-anthy/engine/engine.py", line 1854, in _mk_key
    if unichr(keyval) in u'!"#$%^\'()*+,-./:;<=>?@[\]^_`{|}~':
ValueError: unichr() arg not in range(0x110000) (wide Python build)

Local variables in innermost frame:
state: 4
keyval: 16777215L