Comment 2 for bug 796145

The precise error is this one:
Unpacking replacement libcomerr2 ...

Processing triggers for man-db ...

Processing triggers for ureadahead ...

Processing triggers for python-gmenu ...

Rebuilding /usr/share/applications/desktop.en_US.utf8.cache...

Processing triggers for desktop-file-utils ...

Processing triggers for doc-base ...

Segmentation fault

dpkg: error processing doc-base (--unpack):

 subprocess installed post-installation script returned error exit status 139

Processing triggers for install-info ...

Processing triggers for python-support ...

Errors were encountered while processing:

 doc-base

The other error about aspell is that the .deb is corrupted. You should do apt-get clean and retry the upgrade. Reassigning to doc-base for the first (transient) error.