PCManFM lists all partitions and devices twice

In Lubuntu 12.10 Beta1 with E17 installed:

In the E17 session, PCManFM lists all partitions and devices twice. That does not happen in 12.04. It is something that happened a year ago in the Lxde session but was corrected.

E17 is an increasingly popular desktop environment. It is important to get it fixed, preferably for the final release.

Thanks.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: pcmanfm 1.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.5.0-15.23-generic 3.5.4
Uname: Linux 3.5.0-15-generic i686
ApportVersion: 2.5.2-0ubuntu4
Architecture: i386
Config_pcmanfm_System_enlightenment: Error: [Errno 2] No such file or directory: '/etc/xdg/pcmanfm/pcmanfm.conf'
Date: Wed Sep 26 12:37:18 2012
InstallationMedia: Lubuntu 12.10 "Quantal Quetzal" - Alpha i386 (20120905.1)
Pref_Config_System_enlightenment:
 [Preferred Applications]
 WebBrowser=firefox.desktop
 MailClient=
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: pcmanfm
Udisks_dump: Error: [Errno 2] No such file or directory: 'udisks'
UpgradeStatus: No upgrade log present (probably fresh install)