I have had my iPhone 4 since June 23rd and have used a white bumper on it since then as well. I just took off my bumper for the first time to clean the whole phone and noticed a bunch of small black/silver scratch marks on the inside of the bumper. So I look at the sides of the iPhone 4 and there are tons of small nicks/scratches on the antenna where the bumper covers. Anyone else been using a bumper for a few weeks able to take it off and take a look to see if yours is scratched too? I'll try to post a pic soon if no one else has this problem..