django 1.5 admin inline extra

I have some models with a large number of inlines. Since not all are needed for every object I declared the inline model with extra = 0 so that a small add + appeared on the inline.

However, this seems to no longer work in django 1.5. If extra = 0 is set, the inline is no longer editable.

Is there a way to get the 1.4 behavior into 1.5?

Example Code:

class ModelInline(admin.StackedInline):
    model = MyModel
    extra = 0

class OtherModelAdmin(admin.ModelAdmin)
    inlines = [ModelInline]

admin.site.register(OtherModel, OtherModelAdmin)

Edit (some screens):

Django 1.4:

Django 1.5:

(Hinzufügen == add)

This is already happen before.

The new javascript made this impossible because the "Add Another" button 
was controlled by max_num, and ignored a value of 0.
The javascript ignored a value of 0 because max_num has a default value of 0, 
and all the code using it had taken to equating max_num = 0 with being "off". 
So you can't actually have a maximum of 0. It's not possible.

There is a patch create by Gabrial Hurley to restores desired behaviour without breaking anything else. This is 3years ago and I don't know if it still working for Django 1.5. Just try :)

https://code.djangoproject.com/attachment/ticket/13023/13023_inlines_patch.diff

Here is the ticket for that same bug (3 years ago):

https://code.djangoproject.com/ticket/13023