Bug#801973: [Pkg-roundcube-maintainers] Bug#801973: error 255 on package configuration

[e-mmanuel]

But during the upgrade from 0.9.5+dfsg1-4.2 to 1.1.1+dfsg.1-1, I purged 
the roundcube* packages and removed /etc/roundcube because all was 
broken (error 255 too).

Maybe I have forgotten symlinks.
If you have a list of symlinks to check, let me known,
Emmanuel.