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For me, that icon (i.e. the icon representing your computer) doesn't appear in Column View either.

It does appear in the Finder windows' sidebar, if that's any help to you. (If it's not in the sidebar, you can right-click in the sidebar and select "Open Sidebar Preferences..." and show it there.
 
See the attached images that should help.
 

Attachments

  • Screen shot 2010-05-31 at 8.23.28 AM.png
    Screen shot 2010-05-31 at 8.23.28 AM.png
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  • Screen shot 2010-05-31 at 8.23.16 AM.png
    Screen shot 2010-05-31 at 8.23.16 AM.png
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