Display lights up in lila for a milisecond when turning display on [Random]

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http://forum.xda-developers.com – Hello. I have this problem(?) since i bought the S3.. So it happens really random, maybe 2 times a month.. So it just happened today again, i just pressed the homebutton when suddenly the whole display went LILA for a milisecond and then it was fine again.. I could record that, but i can't, because it just happens very very randomally, so i don't know when it happens. So what is this ? A software problem? (Updated it to the newest, still) My S3 has no display damages nor device damages and it started since the beginning. Im just worrieng, is it worth wasting the warranty? Thanks :) (HowTos)