When I plugin a usb-drive or open dmg-archives they don't appear under the 'Devices' section in the sidebar of the Finder anymore.
The drives are there when I check with 'Disk Utility', they appear on the Desktop and I can browse the files if I go to /Volumes.
I have 'Hard disks' and 'External disks' checked in the Finder preferences -> Sidebar tab.
Any ideas on how to get them to show up in the sidebar?
I'm using MacOS Lion 10.7.5.