Django 1.11.4:

Bugfixes:

Fixed a regression in 1.11.3 on Python 2 where non-ASCII format values for date/time widgets results in an empty value in the widget窶冱 HTML.
Fixed QuerySet.union() and difference() when combining with a queryset raising EmptyResultSet.
Fixed a regression in pickling of LazyObject on Python 2 when the wrapped object doesn窶冲 have __reduce__().
Fixed crash in runserver窶冱 autoreload with Python 2 on Windows with non-str environment variables.
Corrected Field.has_changed() to return False for disabled form fields: BooleanField, MultipleChoiceField, MultiValueField, FileField, ModelChoiceField, and ModelMultipleChoiceField.
Fixed QuerySet.count() for union(), difference(), and intersection() queries..
Fixed ClearableFileInput rendering as a subwidget of MultiWidget. Custom clearable_file_input.html widget templates will need to adapt for the fact that context values checkbox_name, checkbox_id, is_initial, input_text, initial_text, and clear_checkbox_label are now attributes of widget rather than appearing in the top-level context.
Fixed queryset crash when using a GenericRelation to a proxy model

(adam)