3GPP SS-Status is OctetString not Grouped 3GPP TS 29.272 V12.5.0 (2014-06) corrected table 7.3.1/1 row SS-Status to be OctetString instead of Grouped. Clause 7.3.88 already described SS-Status as OctetString. The previous definition was from 3GPP TS 29.272 V12.0.0 (2013-03).

The digested changelog can be found under:
 contrib/debian/changelog
 
You can also find the exhaustive list of change using mercurial history, 
or at the following URL: http://www.freediameter.net/hg/freeDiameter/shortlog