ManyToManyField is required unless blank=True specified
|Reported by:||Owned by:||nobody|
|Has patch:||no||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
In the admin interface, ManyToManyFields must have blank=True in order to not be required. This may possibly not be a bug, but the documentation should be updated to outline this issue.
This is present in r7450