RStudio fails to save changes to Rmd in cases where the notebook has duplicate labels.
Although the top of the file shows an error as "Error creating notebook: duplicate label 'this label'." it does not make clear that a save failed to happen and the * indicator will go away (as if it did save).
I've lost changes as a result of this. I don't generally care if the html associated with a notebook is generated and don't see why I need unique labels.