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<font size="-1">You can close this bug as I found the answer here:
<a class="moz-txt-link-freetext" href="http://askubuntu.com/questions/73638/duplicate-icons-in-gnome-shell">http://askubuntu.com/questions/73638/duplicate-icons-in-gnome-shell</a><br>
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Turns out that menu-xdg is the one showing the duplicate entries.
Uninstalling it fixes the issue.<br>
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BR<br>
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