One of my customers uses a machine running CentOS 6.4 with Gnome 2.28.2. Whenever he plugs a USB memory stick or external hard drive into the machine he gets an error pop-up that simply states
Unable to mount <filesystem name>. Not Authorized.. We've tried devices formatted with FAT and EXT4. The only way I've found to mount these devices is by running palimpsest as root. Even then, the user cannot write to the file system. I suspect this is permissions related.
So, my question is how can we restore the default behaviour for standard users where USB devices can be mounted and used normally?