getting 'NoneType' object is unsubscriptable errors

Hi,

I am getting the following errors on some of the web pages

-----------------------------------------------------------

'NoneType' object is unsubscriptable

Request Method: GET
Request URL: http://nerd.hoonur.com/mypage/4605f1e14430950e07b74b5374472f00
Exception Type: TypeError
Exception Value:

'NoneType' object is unsubscriptable

Exception Location:
/home/balaji/new-staging-setup/trunk/hydra_classifieds/root/balaji_classifieds/classifieds/views.py
in get_gadget_data, line 2570
Python Executable: /usr/bin/python
Python Version: 2.6.2
Python Path:
['/home/balaji/new-staging-setup/trunk/hydra_classifieds/root/',
'/usr/local/lib/python2.6/dist-packages/pymongo-1.7-py2.6-linux-x86_64.egg',
'/usr/local/lib/python2.6/dist-packages/simplejson-2.1.1-py2.6.egg',
'/usr/lib/python2.6', '/usr/lib/python2.6/plat-linux2',
'/usr/lib/python2.6/lib-tk', '/usr/lib/python2.6/lib-old',
'/usr/lib/python2.6/lib-dynload', '/usr/lib/python2.6/dist-packages',
'/usr/lib/python2.6/dist-packages/PIL', '/var/lib/python-support/python2.6',
'/var/lib/python-support/python2.6/gtk-2.0',
'/usr/lib/python2.6/dist-packages/wx-2.8-gtk2-unicode',
'/usr/local/lib/python2.6/dist-packages',
path('/home/balaji/new-staging-setup/trunk/python_modules'),
path('/home/balaji/new-staging-setup/trunk/hydra_classifieds/root/balaji_classifieds/python_modules')]
Server time: Wed, 1 Jun 2011 12:51:55 +0530

-----------------------------------------------------------

I tried putting the code line where the error was occuring under
try-catch-exception but still the error exits.

What could be the reason for the above error and possible solution to get
rid of above error?

Help would be highly appreciated !
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