This ticket relates to http://jira.sonarsource.com/browse/RSPEC-128, which will need to be updated.
Currently, the rule title is "Switch cases should end with an unconditional break statement".
That rule is in fact too strong, as there is no real issue on code where the last case has no break, such as:
So it would be better to rename the rule into something like "Non-empty switch cases should not fall-through the next one.".
So, here is the newly wanted behavior: