When having volumes or for example samba shares mounted under /media/my/share, Nautilus displays them under computer://. When navigating to computer://, clicking the share's icon and then pressing backspace Nautilus navigates to /media/my instead of navigating back to "computer://", where I actually came from. Of course, in theory this is correct, but still it confuses the end-user which thinks "Oh great, my CD-ROM has just been mounted, just like my DVD-ROM on my second drive! Let's browse the DVD-RO... oh no, I clicked the CD-ROM, let's press 'Go Up' or Backspace to get back to 'My Computer'", to visualize it.

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