Continuing the discussion from REST Web Services module 2.12 released:
This does appear to be a bug, and one with fairly significant impact. See https://modules.openmrs.org/#/show/153/webservices-rest for example.
Can anyone work on this?
Presumptive example of an approach to the problem. 
I raised a ticket a while ago about this, which can be found here:
@darius speculated that it might be more to do with the non-conventional alphanumeric commit hash appended to the end of the version, than with a problem with version numbers greater than 9.
Mike
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