When uninstalling the server, some directories are left around: > /opt/thinlinc > /opt/thinlinc/sbin > /opt/thinlinc/share > /opt/thinlinc/share/icons > /opt/thinlinc/share/man > /opt/thinlinc/share/man/man7 > /opt/thinlinc/share/doc > /opt/thinlinc/lib > /opt/thinlinc/lib64 > /opt/thinlinc/etc > /opt/thinlinc/etc/conf.d > /opt/thinlinc/etc/tlwebaccess > /opt/thinlinc/bin > /opt/thinlinc/libexec I think this is just an RPM problem as I believe dpkg removes empty directories. Also see bug 3666.
This got resolved with bug 4885. The only things left in place are now because of bug 3666.