Z-push contains manpages, for utilities installed in /usr/sbin. As per the FHS policy, manpages for system administration commands should be installed in section 8, not section 1.
This is now warned about by Debian's lintian since its most recent update.
Update: after checking this out a bit more it turns out that the RPM packaging installs the tools in /usr/bin, while the DEB packaging installs them in /usr/sbin. So, the problem isn't with the manpages per se, but with a difference in the two types of packaging.
Is there any reason for these utilities to be in /usr/bin in the RPM-based systems?