Аналогично для branch 4.1

# apt-get install gxneur
Reading Package Lists... Done
Building Dependency Tree... Done
The following extra packages will be installed:
  libxneur xneur
The following NEW packages will be installed:
  gxneur libxneur xneur
0 upgraded, 3 newly installed, 0 removed and 0 not upgraded.
Need to get 945kB/968kB of archives.
After unpacking 2711kB of additional disk space will be used.
Do you want to continue? [Y/n]
Get:1 ftp://gate.tts.loc i586/classic xneur 0.9.7-alt1.M41.2 [871kB]
Get:2 ftp://gate.tts.loc i586/classic gxneur 0.9.7-alt1.M41.2 [74.4kB]
Fetched 945kB in 0s (3776kB/s)
Committing changes...
Preparing...                 ############################################################################# [100%]
1: libxneur                  ############################################################################# [ 33%]
2: xneur                     ############################################################################# [ 66%]
3: gxneur                    ############################################################################# [100%]
Running /usr/lib/rpm/posttrans-filetriggers
warning: kpathsea: No usable entries in /etc/texmf/ls-R.
warning: kpathsea: See the manual for how to generate ls-R.
warning: kpathsea: No usable entries in /var/cache/texmf/ls-R.
warning: kpathsea: See the manual for how to generate ls-R.
warning: kpathsea: No usable entries in /usr/share/texmf/ls-R.
warning: kpathsea: See the manual for how to generate ls-R.
warning: kpathsea: No usable entries in /usr/share/texmf-texlive/ls-R.
warning: kpathsea: See the manual for how to generate ls-R.
warning: kpathsea: No usable entries in /usr/share/texmf/doc/ls-R.
warning: kpathsea: See the manual for how to generate ls-R.
Done.

А при чём тут xneur, если ругается левый файлтриггер на левые файлы?

Ни при чём.