Building current master on debian stable:

   Failed test at t/po.t line 538.
#                   '<p>Tails takes <BD> hour to install</p>
# '
#     doesn't match '(?^usx:
#       .*
#       L'installation\sde\sTails\sdure\s<BD>\sheure
#       .*
# )'
# Looks like you failed 1 test of 126.
t/po.t .........................
Dubious, test returned 1 (wstat 256, 0x100)

The failing code comes from "t/po.t: add test for UTF-8 vs. po4a 0.58+"

It builds ok on debian unstable. --Joey