id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
21531	Django 1.6 forms.SlugField validation error	20tab	nobody	"Hi, 

I have a problem with SlugField. 

In my model I have this field:  slug = models.SlugField(_(u'Slug'), blank=True, null=True)

Adding an item through admin, django catches this error: 

Django Version:	1.6
Exception Type:	AttributeError
Exception Value:	
'NoneType' object has no attribute 'strip'
Exception Location:	myvirtualenv/lib/python2.7/site-packages/django/forms/fields.py in clean, line 1142

Is this a bug or my fault?

I tried the same code with django 1.5.5 and it works.

Thanks"	Bug	closed	Forms	1.6	Normal	invalid			Accepted	0	0	0	0	0	0