I know there isn't a stable release of menu breadcrumb yet but...
Today I noticed that when I went to change the name of a taxonomy term the title on the taxonomy term page didn't reflect the change to the name field that I had just made. By this I mean while editing the name field at taxonomy/term/[tid here]/edit the corresponding title on taxonomy/term/[tid here] doesn't reflect the updated name field.
The title on the taxonomy term page actually seems to be pulling from the menu items text. This goes for the breadcrumb too. The text within the breadcrumb appears to be pulling from the menu items text as well but this might be the default behavior...???
After disabling the menu breadcrumb module this corrects itself. I have a custom menu that has custom menu items that have url's pointing to the taxonomy pages.