As with the v2 driver, the uninstaller can't tell if certain files should be deleted or not, and so leaves them in /usr/lib:
/usr/lib/libqui.so* (provided by package libqt3-mt)
/usr/lib/libqt-mt* (provided by package libqt3-mt)
/usr/lib/libtiff.so.3* (provided by package libtiff3, which was replaced by libtiff4 several years ago)
/usr/lib/libstdc++.so.5* (provied by package libstdc++5)
The Uninstaller Routinely Fails
Depending on the exact combination of Qt3 and Qt4 libraries on your computer, one of several errors could occur when trying to run the uninstaller that results in the inability to automatically remove the driver.
Replacement of /usr/bin/lpr
As with the v2 driver, the Samsung installer still moves /usr/bin/lpr to /usr/bin/lpr.org and writes /usr/bin/lpr as a link to /opt/Samsung/mfp/bin/slpr, which (a) breaks the cups-bsd (or cupsys-bsd) packages, (b) can itself be overwritten when the CUPS package is updated and it writes back to /usr/bin/lpr, and (c) breaks non-graphical and automated applications, because slpr requires a graphical environment and user intervention.
Parallel Port Interference
Also as with the v2 driver, the Samsung installer writes parallel port information to /etc/modprobe.conf, which then blocks reading of /etc/modprobe.d/, and so all blacklists or other hardware support configurations present in /etc/modprobe.d/ are ignored. In addition, computers without physical parallel ports sometimes exhibit odd behavior due to this forced parallel support.
Inappropriate Permissions
Many of the files installed to /usr/lib/ end up with 777 permissions: i.e., world-writable and world-executable. Even non-executable library files are given these permissions. The result is a possible security risk to your system (although smaller than any of the v2 issues).
Inappropriate Ownership
Greatly improved compared to the v2 installer, the only incorrect ownership is that the .gnome-desktop folder and .desktop file within it are given a group of root rather than the user. This is not a security risk, but can be a nuisance.
Additional Notes about the v3 Installer/Uninstaller
The installer and uninstaller go to lengths to restart CUPS, but I can determine no reason this is necessary
The Qt4 interface must be installed manually if you use the Samsung Installer, see the Ubuntu Forum Thread
The installer does prompt to add users to the lp group, which is helpful for using the Samsung Configurator, but fairly minor.
The installer automatically installs a printer; sometimes it is the correct one and it works, sometimes it appears but correct but doesn't work, and sometimes it's a seemingly random choice (it's not, it actually has to do with sort order in the samsung/ppd folder)
Files Installed by the Samsung v3 Driver
Note: for AMD64 installations, /usr/lib/ may actually be /usr/lib64/ (this is not true of Debian).
/opt/Samsung/mfp/*
/usr/sbin/smfpd
/usr/bin/lpr (link to /opt/Samsung/mfp/bin/slpr after moving the original lpr to lpr.orig)
/usr/share/cups/model/samsung/*
/usr/share/ppd/samsung
/usr/lib/libmfp.so*
usr/lib/libstdc++-3-libc6.2-2-2.10.0.so
/usr/lib/libstdc++-libc6.2-2.so.3
/usr/lib/libstdc++.so.5* (if no version of libstdcc++5 installed)
/usr/lib/libtiff.so.3*
/usr/lib/libqt-mt.so* (only if no version of libqt3-mt installed)
/usr/lib/libqui.so* (only if no version of libqt3-mt installed)
/usr/lib/cups/backend/mfp
/usr/lib/cups/filter/libscmssf.so
/usr/lib/cups/filter/libscmssc.so
/usr/lib/cups/filter/rastertosamsunginkjet
/usr/lib/cups/filter/rastertosamsungpcl
/usr/lib/cups/filter/rastertosamsungspl
/usr/lib/cups/filter/rastertosamsungsplc
/usr/lib/cups/filter/pscms
/usr/lib/sane/libsane-smfp.so*
/etc/sane.d/smfp.conf
/etc/modprobe.conf
/etc/mfpcommon.modules.conf
/etc/init.d/smfpd
/etc/rc0.d/K07smfpd
/etc/rc1.d/K07smfpd
/etc/rc6.d/K07smfpd
/etc/rc2.d/S93smfpd
/etc/rc3.d/S93smfpd
/etc/rc4.d/S93smfpd
/etc/rc5.d/S93smfpd
The following are typically installed, but the location may vary somewhat with distribution and desktop environment: