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opening power point slide with libre office adds invisible icon on unity launcher

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linux-howto

http://askubuntu.com – Whenever I open a power point slide in ubuntu 12.04 it opens correctly in libre office but in addition to the libre office's app for slides another invisible icon appears for each presentation I open. It is visually very distracting. When I have the mouse over the icon it says something like "binary star office importer" or something like that. Is there a way to not show these invisible icons (only way I see them is cause when I open another app after the presentation it slots in below 3 places on the launcher) Weird hey? If needs be I could perhaps submit a screenshot. (HowTos)