I searched my computer and found that these files are also present in /var/lib/lightdm, created by user lightdm.
Look at bug #728700. The submitter of that bug thinks that this is caused by failed copies, but I have been unable to duplicate this.
I searched my computer and found that these files are also present in /var/lib/lightdm, created by user lightdm.
Look at bug #728700. The submitter of that bug thinks that this is caused by failed copies, but I have been unable to duplicate this.