AP_FIRSTPAGE_InputSlot option not accepted

jreeves@oasouth-printserver:~$ apt-cache show cups
Package: cups
Priority: optional
Section: net
Installed-Size: 8308
Maintainer: Ubuntu Core Developers <email address hidden>
Original-Maintainer: Debian CUPS Maintainers <email address hidden>
Architecture: amd64
Version: 1.4.3-1ubuntu1.3
Replaces: cupsddk-drivers (<< 1.4.0), cupsys (<< 1.3.7-6), cupsys-bsd (<< 1.3.7-5)
Provides: cupsddk-drivers, cupsys
Depends: libavahi-client3 (>= 0.6.16), libavahi-common3 (>= 0.6.16), libc6 (>= 2.7), libcups2 (>= 1.4.0), libcupscgi1 (>= 1.4.2), libcupsdriver1 (>= 1.4.0), libcupsimage2 (>= 1.4.0), libcupsmime1 (>= 1.4.0), libcupsppdc1 (>= 1.4.0), libdbus-1-3 (>= 1.0.2), libgcc1 (>= 1:4.1.1), libgnutls26 (>= 2.7.14-0), libgssapi-krb5-2 (>= 1.8+dfsg), libijs-0.35, libkrb5-3 (>= 1.6.dfsg.2), libldap-2.4-2 (>= 2.4.7), libpam0g (>= 0.99.7.1), libpaper1, libpoppler5, libslp1, libstdc++6 (>= 4.1.1), libusb-0.1-4 (>= 2:0.1.12), zlib1g (>= 1:1.1.4), debconf (>= 1.2.9) | debconf-2.0, poppler-utils (>= 0.12), perl-modules, procps, ghostscript, lsb-base (>= 3), cups-common (>= 1.4.3), cups-client (>= 1.4.3-1ubuntu1.3), ssl-cert (>= 1.0.11), adduser, bc, ttf-freefont
Recommends: foomatic-filters (>= 4.0), cups-driver-gutenprint, ghostscript-cups
Suggests: cups-bsd, cups-ppdc, foomatic-db-engine, foomatic-db, hplip, xpdf-korean | xpdf-japanese | xpdf-chinese-traditional | xpdf-chinese-simplified, cups-pdf, smbclient (>= 3.0.9), udev
Conflicts: cupsddk-drivers (<< 1.4.0), cupsys (<< 1.3.7-6), cupsys-bsd (<< 1.3.7-5), libpoppler5 (<< 0.12.2-2)
Breaks: foomatic-filters (<< 4.0)
Filename: pool/main/c/cups/cups_1.4.3-1ubuntu1.3_amd64.deb
Size: 1973814
MD5sum: a4a1179e95981ee33f731c0f7275cfe4
SHA1: b822abae968cd90e8f79efae03e9fb94b3e74571
SHA256: 86ba391d92943e270112a65187cb6d1e523684b388e9a27939a11fef1c21fc6c
Description: Common UNIX Printing System(tm) - server
 The Common UNIX Printing System (or CUPS(tm)) is a printing system and
 general replacement for lpd and the like. It supports the Internet
 Printing Protocol (IPP), and has its own filtering driver model for
 handling various document types.
 .
 This package provides the CUPS scheduler/daemon and related files.
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu
Supported: 5y
Task: ubuntu-desktop, print-server, kubuntu-desktop, kubuntu-netbook, edubuntu-desktop, xubuntu-desktop, ubuntu-netbook

Package: cups
Priority: optional
Section: net
Installed-Size: 8300
Maintainer: Ubuntu Developers <email address hidden>
Original-Maintainer: Debian CUPS Maintainers <email address hidden>
Architecture: amd64
Version: 1.4.3-1
Replaces: cupsddk-drivers (<< 1.4.0), cupsys (<< 1.3.7-6), cupsys-bsd (<< 1.3.7-5)
Provides: cupsddk-drivers, cupsys
Depends: libavahi-client3 (>= 0.6.16), libavahi-common3 (>= 0.6.16), libc6 (>= 2.7), libcups2 (>= 1.4.0), libcupscgi1 (>= 1.4.2), libcupsdriver1 (>= 1.4.0), libcupsimage2 (>= 1.4.0), libcupsmime1 (>= 1.4.0), libcupsppdc1 (>= 1.4.0), libdbus-1-3 (>= 1.0.2), libgcc1 (>= 1:4.1.1), libgnutls26 (>= 2.7.14-0), libgssapi-krb5-2 (>= 1.6.dfsg.2), libijs-0.35, libkrb5-3 (>= 1.6.dfsg.2), libldap-2.4-2 (>= 2.4.7), libpam0...

The problem is that this option is not implemented in the pdftopdf filter. I have asked the upstream author of the pdftopdf filter to implement it. He usually fixes things quickly.