Fixes:
Exception Value:	'Category' object has no attribute 'strip'
Exception Location:	/usr/local/python-env/medtehnica.ro/src/django-categories/categories/templatetags/category_tags.py in get_category, line 49
Fixes:
Exception Value:	'NoneType' object has no attribute 'get_children'
Exception Location:	/usr/local/python-env/medtehnica.ro/lib/python2.6/site-packages/mptt/utils.py in drilldown_tree_for_node, line 140