Android Galaxy Tab: Why is the launch icon surrounded by a pink border?

Question

I followed the icon design recommendations from android, so I have an icon of different sizes:

drawable-hdpi (96x96)
drawable-hdpi (72x72)
drawable-ldpi (36x36)
drawable-mdpi (48x48) 

But on the Samsung Galaxy tab, the icon gets a weird purple-pink border. Angry Birds seems to have the same problem. Facebook was able to change it to blue. So what is this border and how to remove it?

Screenshot

Answer 1

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