apt-get stuck on libsane-extras

[Anthony Campbell <ac@acampbell.org.uk>]

Apt-get is trying to install libsane-extras but it says:

npacking libsane-extras (from .../libsane-extras_1.0.18.15_i386.deb) ...
dpkg: error processing
/var/cache/apt/archives/libsane-extras_1.0.18.15_i386.deb (--unpack):
trying to overwrite `/usr/share/man/man5/sane-epkowa.5.gz', which is
also in package iscan dpkg-deb: subprocess paste killed by signal
(Broken pipe) Errors were encountered while processing:
/var/cache/apt/archives/libsane-extras_1.0.18.15_i386.deb E: Sub-process
/usr/bin/dpkg returned an error code (1)


I've tried apt-get -f install and I've manually deleted
/usr/share/mam/man5/sane-epkowa.5.gz but no improvement.
I don't want to try purging sane because I need to be able to send faxes
and if I can't reinstall it I shall be stuck.

Any suggestions of what to try? 

Anthony

-- 
Anthony Campbell - ac@acampbell.org.uk 
Microsoft-free zone - Using Linux Gnu-Debian
http://www.acampbell.org.uk (blog, book reviews, 
on-line books and sceptical articles)