Why there is a blue contour around my application icon which is installed on the Samsung Galaxy tab

I installed my application on a Samsung Galaxy Tab, the application icon has a blue contour around it, does any one know why? other applications 开发者_运维知识库installed don't have this blue contour,

I've noticed that all applications created from Eclipse have the same issue

thanks

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This question has an accepted answer:
Samsung Galaxy S features icon backdrops in Launcher, any way to specify it?

In summary, the Samsung "Applications" launcher does this, and I haven't found a way to customize it.