A series of graph can be accessed from either:
Visitors >> Overview
Visitors >> Engagement
All graphs appear as expected, except the one for "Returning Visits" where the graph does not get plotted on either the Overview page or the Engagement page.
There was a problem with the same "Returning Visits" graph in v1.4 but the graph does not appear at all since upgrading to 1.5. A screenshot is attached to show the missing graph when the date range is for a month. Note, the graph is missing for any date range chosen.
Attachment: Shows the returning visits graph is not being plotted
In my description of the bug, I made the mistake of not referring to the specific page with the problem. The one where a graph does not appear is the one showing a percentage of "returning visits have bounced".