Lubuntu live session cannot write to external media on filesystem or internal drives.

To reproduce boot a live session amd64 version of lubuntu mount a filesystem in pcmanfm on the left side bar by clicking on it in the places menu. It will mount then go to this filesystem and try to create a new file or write data to it. I get the error Error opening file '/media/lubuntu/61d4ba96-45cf-4b52-b7df-17bcff423c6b/canhazwrite': Permission denied when trying to create a new file canhazwrite on this small sd card on my system.

Description: Ubuntu Utopic Unicorn (development branch)
Release: 14.10

lxpolkit:
  Installed: (none)
  Candidate: 0.4.9.2+git20140410-0ubuntu2
  Version table:
     0.4.9.2+git20140410-0ubuntu2 0
        500 http://archive.ubuntu.com/ubuntu/ utopic/universe amd64 Packages

I expected to be able to write to filesystems on the live session like ubuntu and other systems like I normally can. Instead I get permission denied in the lubuntu live session user.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: lxpolkit (not installed)
ProcVersionSignature: Ubuntu 3.16.0-10.15-generic 3.16.1
Uname: Linux 3.16.0-10-generic x86_64
ApportVersion: 2.14.6-0ubuntu2
Architecture: amd64
CasperVersion: 1.343
CurrentDesktop: LXDE
Date: Wed Aug 27 19:03:34 2014
LiveMediaBuild: Lubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140826.1)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: lxsession
UpgradeStatus: No upgrade log present (probably fresh install)