The new version of task seems to have problems with german »ü« (and
other).

   ~> task add Test für Debian
   Invalid Unicode codepoint.
   ~> task add Test fär Debian
   Created task 27.
   ~> task add Test för Debian
   [1]    3083 segmentation fault  task add Test för Debian
   ~> task add Test fßr Debian
   Created task 28.
   ~> task add äöü
   Created task 29.

This is reproducable in this way. I have to say, that my terminal is
using latin1 locale (as you could see below). But that was never a
problem. I am also able to edit a task and input »Ü« or »ö«. But I am
not able to add it on the commandline. The output is always correct.
(Apart the fact that task has problems with displaying colored lines
with multibyte characters in the correct width. But that was the case
also with older versions.)