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

Question

I followed the icon design guidelines from android and so I have icon in different size:

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-ish border. The Game 'Angry Birds' seems to have the same problem. Facebook was able to change it to blue. So what is this border and how can I remove it?

Screenshot

Answer 1

I've observed that the Tab picks some background color to use to frame your icon, even if the icon is rendered with a transparent background: the calendar has a dark frame, gmail has the same pinkish/purple color as Angry Birds, and my icons which have transparent backgrounds/no borders on the Nexus 1 have weird blue colors. In fact, ALL of the icons on the Tab have a background and border. I've had to conclude there is no way to get rid of it, and there is currently no published algorithm as to how it picks the color.