User-Agent:       Mozilla/5.0 (X11; Linux i686; rv:18.0) Gecko/20100101 Firefox/18.0
Build Identifier: 

Wnen I open Details, I get several choices. I don't know which is appropriate.
Here is the text:
SELinux is preventing /usr/bin/gsf-office-thumbnailer from write access on the directory /home/jones/.thumbnails/normal.

*****  Plugin restorecon (82.4 confidence) suggests  *************************

If you want to fix the label. 
/home/jones/.thumbnails/normal default label should be thumb_home_t.
Then you can run restorecon.
Do
# /sbin/restorecon -v /home/jones/.thumbnails/normal

*****  Plugin file (7.05 confidence) suggests  *******************************

If you think this is caused by a badly mislabeled machine.
Then you need to fully relabel.
Do
touch /.autorelabel; reboot

*****  Plugin file (7.05 confidence) suggests  *******************************

If you think this is caused by a badly mislabeled machine.
Then you need to fully relabel.
Do
touch /.autorelabel; reboot

*****  Plugin catchall_labels (4.59 confidence) suggests  ********************

If you want to allow gsf-office-thumbnailer to have write access on the normal directory
Then you need to change the label on /home/jones/.thumbnails/normal
Do
# semanage fcontext -a -t FILE_TYPE '/home/jones/.thumbnails/normal'
where FILE_TYPE is one of the following: thumb_home_t, cache_home_t, xdm_tmp_t, gstreamer_home_t, thumb_tmpfs_t, user_home_dir_t, thumb_tmp_t, tmpfs_t, user_fonts_cache_t, tmp_t, user_tmp_t. 
Then execute: 
restorecon -v '/home/jones/.thumbnails/normal'


*****  Plugin catchall (1.31 confidence) suggests  ***************************

If you believe that gsf-office-thumbnailer should be allowed write access on the normal directory by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# grep gsf-office-thum /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                unconfined_u:unconfined_r:thumb_t:s0-s0:c0.c1023
Target Context                system_u:object_r:file_t:s0
Target Objects                /home/jones/.thumbnails/normal [ dir ]
Source                        gsf-office-thum
Source Path                   /usr/bin/gsf-office-thumbnailer
Port                          <Unknown>
Host                          localhost.localdomain
Source RPM Packages           libgsf-1.14.24-1.fc18.i686
Target RPM Packages           
Policy RPM                    selinux-policy-3.11.1-76.fc18.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     localhost.localdomain
Platform                      Linux localhost.localdomain
                              3.7.6-201.fc18.i686.PAE #1 SMP Mon Feb 4 16:05:44
                              UTC 2013 i686 i686
Alert Count                   1
First Seen                    2013-02-11 15:49:45 EST
Last Seen                     2013-02-11 15:49:45 EST
Local ID                      e79c3060-e1b5-4be1-b6e9-ef8507b1f6a5

Raw Audit Messages
type=AVC msg=audit(1360615785.157:334): avc:  denied  { write } for  pid=1572 comm="gsf-office-thum" name="normal" dev="sda8" ino=654702 scontext=unconfined_u:unconfined_r:thumb_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=dir


type=SYSCALL msg=audit(1360615785.157:334): arch=i386 syscall=open success=no exit=EACCES a0=8a12888 a1=80c2 a2=180 a3=12 items=0 ppid=1468 pid=1572 auid=1000 uid=1000 gid=1000 euid=1000 suid=1000 fsuid=1000 egid=1000 sgid=1000 fsgid=1000 ses=2 tty=(none) comm=gsf-office-thum exe=/usr/bin/gsf-office-thumbnailer subj=unconfined_u:unconfined_r:thumb_t:s0-s0:c0.c1023 key=(null)

Hash: gsf-office-thum,thumb_t,file_t,dir,write

audit2allow

#============= thumb_t ==============
#!!!! The source type 'thumb_t' can write to a 'dir' of the following types:
# thumb_home_t, cache_home_t, xdm_tmp_t, gstreamer_home_t, thumb_tmpfs_t, user_home_dir_t, thumb_tmp_t, tmpfs_t, user_fonts_cache_t, tmp_t, user_tmp_t

allow thumb_t file_t:dir write;

audit2allow -R

#============= thumb_t ==============
#!!!! The source type 'thumb_t' can write to a 'dir' of the following types:
# thumb_home_t, cache_home_t, xdm_tmp_t, gstreamer_home_t, thumb_tmpfs_t, user_home_dir_t, thumb_tmp_t, tmpfs_t, user_fonts_cache_t, tmp_t, user_tmp_t

allow thumb_t file_t:dir write;



Reproducible: Always

Steps to Reproduce:
1. Boot in LXDE

Actual Results:  
Warning message

Expected Results:  

No message

I get a message involving colord when I start with Desktop.