Fix of admin inlines with 

Now we can specify separate admin widget config:
CKEDITOR_CONFIGS = {
    'default': {
        'toolbar': 'Basic',
    },
    'default_admin': {
        'toolbar': 'Basic',
        'admin_inline': True,
        'jquery_prefix': 'django.jQuery',
    }
}

Where 'admin_inline' is a flag to use another mechanism to create CKEditor widget, and optional 'jquery_prefix' is your admin jQuery prefix,'django.jQuery' for default, it is useful when you has own jQuery for django admin.

Then you should create a ModelForm for your admin, and recreate CKEditorWidget with this config_name:

class BlockAdminForm(ModelForm):
    def __init__(self, *args, ** kwargs):
        super(BlockAdminForm, self).__init__(*args, **kwargs)
        self.fields['content'].widget = CKEditorWidget(config_name='default_admin')

    class Meta:
        model = Block


class BlockAdmin(StackedInline):
    model = Block
    form = BlockAdminForm
    extra = 1


class SomeModelAdmin(ModelAdmin):
    inlines = [BlockAdmin]