BUG #13440: unaccent does not remove all diacritics

The following bug has been logged on the website:

Bug reference:      13440
Logged by:          Mike Gradek
Email address:      mike@busbud.com
PostgreSQL version: 9.3.5
Operating system:   Mac OS X 10.10.3 (14D136)
Description:

Sorry, I couldn't install the most recent minor release, but I did try this
on several different versions. I used Heroku to try a 9.4.3 build, and got
the same results

select 'ț' as input, unaccent('ț') as observed, 't' as expected;
 input | observed | expected
-------+----------+----------
 ț     | ț        | t
(1 row)

Let me know how I can help resolve this bug, or if it's expected.

Best regards,
Mike