With PCManFM 1.2.5 under the 'Places' I only have the 'Home Folder' and a bookmark for / root.
When I plug in a USB device it then appears between the 'Home Folder' and bookmark, which I think is a bit odd in design, I personally think it should be appearing below anything that is listed in the Places, not in between something.
Please see the screen shots. p1.png just shows pcmanfm before the usb device is plugged in, and p2.png shows the device in the places...
Anonymous
Other screen shot...