ROUND_CEiLiNG error in Turkish locale

Binary package hint: indicator-weather

I installed the applet, tried to run it, nothing happened. I just opened a terminal to see what is going on. Here is the result:

Traceback (most recent call last):
  File "/usr/bin/indicator-weather", line 38, in <module>
    from desktopcouch.records.server import CouchDatabase
  File "/usr/lib/pymodules/python2.7/desktopcouch/records/server.py", line 9, in <module>
    from desktopcouch.application.server import *
  File "/usr/lib/pymodules/python2.7/desktopcouch/application/server.py", line 30, in <module>
    from desktopcouch.records.database import Database
  File "/usr/lib/pymodules/python2.7/desktopcouch/records/database.py", line 39, in <module>
    import simplejson as json
  File "/usr/lib/python2.7/dist-packages/simplejson/__init__.py", line 109, in <module>
    from decimal import Decimal
  File "/usr/lib/python2.7/decimal.py", line 3715, in <module>
    val = globals()[globalname]
KeyError: 'ROUND_CEiLiNG'

Then I tried to run the applet in a language neutral environment using LANG=C indicator-weather and then I got the following error:

Traceback (most recent call last):
  File "/usr/bin/indicator-weather", line 1724, in <module>
    locale_name = locale.getlocale()[0].split('_')[0]
AttributeError: 'NoneType' object has no attribute 'split'

Here is some more info:
celal@cepc:~$ lsb_release -rd
Description: Ubuntu 11.04
Release: 11.04

celal@cepc:~$ apt-cache policy indicator-weather
indicator-weather:
  Kurulu: 11.04.10+repack-0ubuntu2
  Aday: 11.04.10+repack-0ubuntu2
  Sürüm tablosu:
 *** 11.04.10+repack-0ubuntu2 0
        500 http://archive.ubuntu.com/ubuntu/ natty/universe amd64 Packages
        100 /var/lib/dpkg/status

Hope you guys can fix it.