hi, dead pixels are very very anoying, i have 2 on my macbook. i tryed to have the screen replaced but they said no...
i strongly suggest getting the matter dealt with asap, and while it may seem tight, i suggest going to a store with a dim looking worker who wont ask any questions! and if that fails, just go round every local o2/carphonewarehouse/applestore, untill the problem is sorted.
best of luck.