Unread Mail count icon broken on Galaxy S II

[thoughtchirps]

I have been using Samsung Galaxy S II on AT&T since last one month, but recently i noticed that Mail count icon (bubble) is little broken when it displays the count of unread emails.

Is it something which is fixable or it's a deeper problem. Please look at the attachment and guide me.

Also, I am not sure if this has been the issue since the beginning because i never noticed it.