[RbnJrg]

I debugged Sigil with gdb and received the following message:

Starting program: /usr/lib/sigil/sigil
/usr/lib/sigil/sigil: error while loading shared libraries: libsigilgumbo.so: cannot open shared object file: No such file or directory

Apparently, the inability to find this library is causing Sigil to abort. I'm going to reinstall the program to see if that solves the problem.

EDIT: By the way, in /usr/lib/sigil/, both files are in that location: sigil and libsigilgumbo.so, so I should conclude that the last one must be corrupted.