Email function doesn't attach file to message in Thunderbird

With Thunderbird as my mail client, the "Email" option in SimpleScan doesn't attach the scanned file to the new message, it just opens a blank message composition window.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: simple-scan 3.4.3-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-59.90-generic 3.2.54
Uname: Linux 3.2.0-59-generic i686
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: i386
Date: Thu Feb 27 11:48:05 2014
DriverPackageVersions:
 libsane 1.0.22-7ubuntu1
 libsane-extras N/A
 hplip 3.12.2-1ubuntu3.4
 hpoj N/A
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
MachineType: Hewlett-Packard HP Compaq dc7700 Small Form Factor
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-59-generic root=UUID=55725784-1c31-48ed-a067-b9a9074cf4fa ro quiet splash vt.handoff=7
SourcePackage: simple-scan
UpgradeStatus: Upgraded to precise on 2012-09-26 (519 days ago)
dmi.bios.date: 08/30/2006
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 786E1 v01.05
dmi.board.name: 0A54h
dmi.board.vendor: Hewlett-Packard
dmi.chassis.type: 4
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr786E1v01.05:bd08/30/2006:svnHewlett-Packard:pnHPCompaqdc7700SmallFormFactor:pvr:rvnHewlett-Packard:rn0A54h:rvr:cvnHewlett-Packard:ct4:cvr:
dmi.product.name: HP Compaq dc7700 Small Form Factor
dmi.sys.vendor: Hewlett-Packard