Errors when used with date field

When I use the Date field and try to create a read-only field I get the following errors:
Notice: Undefined index: module in field_ui_field_edit_form() (line 1885 of /modules/field_ui/field_ui.admin.inc).
Notice: Undefined index: module in field_ui_field_edit_form() (line 1899 of /modules/field_ui/field_ui.admin.inc).
Notice: Undefined index: module in _field_write_instance() (line 585 of /modules/field/field.crud.inc).
Notice: Undefined index: module in _field_info_prepare_instance_widget() (line 386 of /modules/field/field.info.inc).
Notice: Undefined index: module in _field_info_prepare_instance_widget() (line 386 of /modules/field/field.info.inc).

If I have it set as another widget type, say date, and change it to read only I get:
Notice: Undefined index: module in field_ui_widget_type_form_submit() (line 1708 of /modules/field_ui/field_ui.admin.inc).
Notice: Undefined index: module in _field_write_instance() (line 585 of /modules/field/field.crud.inc).
Notice: Undefined index: module in _field_info_prepare_instance_widget() (line 386 of /modules/field/field.info.inc).
Notice: Undefined index: module in _field_info_prepare_instance_widget() (line 386 of /modules/field/field.info.inc).