rpmlint gave me

desktop-printing.src:25: W: prereq-use gtk2 >= %{gtk_version}
The use of PreReq is deprecated. In the majority of cases, a plain Requires
is enough and the right thing to do. Sometimes Requires(pre), Requires(post),
Requires(preun) and/or Requires(postun) can also be used instead of PreReq.

desktop-printing.src: W: mixed-use-of-spaces-and-tabs (spaces: line 25, tab: line 1)
The specfile mixes use of spaces and tabs for indentation, which is a
cosmetic annoyance.  Use either spaces or tabs for indentation, not both.


desktop-printing.src: W: no-url-tag
The URL tag is missing.

desktop-printing.i386: W: non-conffile-in-etc
/etc/dbus-1/system.d/printdriverselector.conf
A non-executable file in your package is being installed in /etc, but is not
a configuration file. All non-executable files in /etc should be configuration
files. Mark the file as %config in the spec file.

desktop-printing.i386: W: non-conffile-in-etc
/etc/xdg/autostart/redhat-print-applet.desktop
A non-executable file in your package is being installed in /etc, but is not
a configuration file. All non-executable files in /etc should be configuration
files. Mark the file as %config in the spec file.

desktop-printing.i386: W: invalid-license GPL
The value of the License tag was not recognized.  Known values are:
"Adobe", "Affero GPL", "AFL", "ARL", "ASL 1.0", "ASL 1.0+", "ASL 1.1", "ASL
1.1+", "ASL 2.0", "ASL 2.0+", "APSL 2.0", "APSL 2.0+", "Artistic 2.0",
"Artistic clarified", "BitTorrent", "Boost", "BSD", "BSD with advertising",
"CeCILL", "CDDL", "CPL", "Condor", "Copyright only", "Cryptix", "Crystal
Stacker", "EPL", "eCos", "EFL 2.0", "EFL 2.0+", "EU Datagrid", "Giftware",
"Glide", "gnuplot", "GPL+", "GPL+ or Artistic", "GPLv2", "GPLv2 with
exceptions", "GPLv2+", "GPLv3", "GPLv3+", "IBM", "IJG", "ImageMagick",
"iMatix", "Intel ACPI", "Interbase", "ISC", "Jabber", "JasPer", "LGPLv2",
"LGPLv2 with exceptions", "LGPLv2+", "LGPLv3", "LGPLv3+", "libtiff", "LPL",
"LPPL", "mecab-ipadic", "MIT", "MPLv1.0", "MPLv1.0+", "MPLv1.1", "MPLv1.1+",
"NCSA", "NGPL", "NOSL", "Netscape", "Nokia", "OpenLDAP", "OpenPBS", "OSL 1.0",
"OSL 1.0+", "OSL 1.1", "OSL 1.1+", "OSL 2.0", "OSL 2.0+", "OSL 3.0", "OSL
3.0+", "OpenSSL", "Phorum", "PHP", "Public Domain", "Python", "QPL", "RPSL",
"Ruby", "Sleepycat", "SISSL", "SLIB", "SPL", "TCL", "UCD", "Vim", "VNLSL",
"VSL", "W3C", "WTFPL", "wxWindows", "xinetd", "Zend", "ZPLv1.0", "ZPLv1.0+",
"ZPLv2.0", "ZPLv2.0+", "ZPLv2.1", "ZPLv2.1+", "zlib", "CDL", "FBSDDL", "GFDL",
"IEEE", "OFSFDL", "Open Publication", "CC-BY", "CC-BY-SA", "DSL", "Free Art",
"Arphic", "Bitstream Vera", "mplus", "OFL", "Utopia", "XANO",
"Redistributable, no modification permitted", "Freely redistributable without
restriction".

desktop-printing.i386: E: invalid-desktopfile
/usr/share/applications/gnome-default-printer.desktop
.desktop file is not valid, check with desktop-file-validate


SHOULD:
 1) Use "sed -i -e 's|\t|  |g' desktop-printing.spec"
 2) Change License tag
 3) PreReq is now deprecated.
 4) Preserve timestamp in cp or install command usage.
 5) use make %{?_smp_mflags}
 6) This package don't need to own /etc/gconf/schemas
 7) use %config(noreplace) for %{_sysconfdir}/dbus-1/system.d/*.conf
 8) desktop-file-validate on redhat-print-applet.desktop gave me
  /etc/xdg/autostart/redhat-print-applet.desktop: warning: key "Encoding" in
group "Desktop Entry" is deprecated
/etc/xdg/autostart/redhat-print-applet.desktop: error: value "TrayIcon" in key
"Categories" in group "Desktop Entry" is a reserved category, so a "OnlyShowIn"
key must be included
 ==> Add OnlyShowIn=GNOME; to /etc/xdg/autostart/redhat-print-applet.desktop

also,
 Do we need to ignore rpmlint warning for desktop file installed at
/etc/xdg/autostart/redhat-print-applet.desktop ?

desktop-printing is no longer shipped in Fedora 8.

It should be marked as dead (cvs tree shiould contain dead.package file with some description). Please, remove all sources and add dead.package file.

Done.