I've started to notice the term "breadcrumb" creeping into the language used in the interface.
The most recent example spotted is in 1.9 dev here:
Hide activity type crumb
Select from whom to hide the activity type (e.g. Quizzes) crumb in the breadcrumb trail displayed for activity modules.
Another example in the My Moodle settings:
This setting forces redirects to /my on login for non-admins and replaces the top level site breadcrumb with /my
My understanding of this term is that it refers to a visual indicator of the PATH taken to arrive at the current location.
My understanding of the position with Moodle is that there is a navigation bar which provides a visual indicator of where your are, without any indication of the path taken to arrive there. http://docs.moodle.org/en/Navigation_bar
Users familiar with the "breadcrumb" as outlined get confused when the navigation bar does not work in this way i.e. the path taken.
I propose that the terms breadcrumb and crumb are removed from the user interface and replaced with references to the navigation bar.