We have complete translation of confluence 3.0.2. After upgrading from 3.0.2 to 3.1.1 the translation of GeneralUtil.java section in ConfluenceActionSupport does not work (we do not see translated time in recently-updated macro content, e.g. "updated less then a minute ago" is now translated as "zmenené less than a minute ago").
Translation of other sections seems to work fine (in ConfluenceActionSupport file the lines above and also below the translation).

The section looks like:

################################################################

1. ACTION: GeneralUtil.java
   ################################################################

show-less=Uk\u00e1za\u0165 menej
show-more=Uk\u00e1za\u0165 viac
one.day.ago=1 de\u0148 dozadu
x.days.ago=

{0} dni(-\u00ed) dozadu
one.hour.ago=hodinu dozadu
x.hours.ago={0}

hodiny(-\u00edn) dozadu
one.min.ago=min\u00fatu dozadu
x.mins.ago=

{0} min\u00fat dozadu
less.than.one.min=menej ne\u017e min\u00fatu dozadu

date.friendly.now=pr\u00e1ve teraz
date.friendly.a.moment.ago=pred chv\u00ed\u013eou
date.friendly.about.one.hour.ago=pribli\u017ene pred hodinou
date.friendly.about.x.hours.ago=pribli\u017ene {0}

hodiny(-\u00edn) dozadu
date.friendly.formatted=

{0}
date.friendly.yesterday=v\u010dera o {0}

What might be the cause of the problem?