Having just upgraded my wife's Pavilion laptop from 10.10 to 11.04, I reinstalled the driver for the jMicron card reader so she could transfer photos from our camera (missing cable). It mounted the MS fine, and copied the files, but when we went to unmount it we got told that it was in use by Nautilus. We had closed all file browser windows and right-clicked on the device on the desktop to remove it; we also tried right-clicking on the device in the Places menu.
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