
One thing I noticed today is that PCManFM seems to have no luck when succesfully ejecting usb devices such as an iPod or a memory drive. It does unmount them but it doesn't eject them completely. When I unmount them, they still appear in both file managers. Thunar, on the other hand, has both options (umount and eject) and when I eject the devices they're no longer powered and "safe" to unplug.
I found this thread about unmounting/ejecting. Seems to me its safer to use the eject option from Thunar.. Is this issue being looked into?
http://ubuntuforums.org/showthread.php?t=451344