Nokia-N900:~# dpkg -l |grep fbreader
ii fbreader 0.12.10-1 e-book reader
rc libzlibrary 0.10.7-13 Platform-dependent part of fbreader
Nokia-N900:~#

that is how things stand. I can't get rid of libzlibrary through apt-get remove apt-get autoremove or apt-get purge, apt-get --purge, apt-get --purge remove etc (you get the point) or the graphical uninstall.

trying now to do 0.12.10-1 says "operaton failed" and libzlibrary 0.12.10-2 says unable to install incompatible application package.

edit here...sorry did not read end of your post will try to download? and then use the dpkg command you gave...I was using the application manager (not clicking download file from your link).