Users need to know the path for an item in advance to create a menu item. This means you need to leave the menu form to get the information and then come back.
Menu name cannot have underscores - most machine readable names can.
There's a maximum length of 27 characters, but no #maxlength on the textfield.
Machine readable name appears above 'title'.
The user forgot to add a menu title and therefore, no menu item was added.
Users expect the menu form to be "Title" and then "Path". Sometimes filling out these fields backwards and ignoring the existing labels entirely.
