iPod touch weird ipod screen problem

[rls11286]

hi guys - i recently had to get a new ipod touch (2nd gen) because my original one would not turn on for some reason. the ipod was out of warrenty but they swapped it out for free since it was only a little over a month out of warrenty. i received the new one the other day and i noticed a weird clicking sound when i touched the screen. its not like the keyboard clicks, it sounds almost like the glass of the screen is not fully attatched to the ipod, like when i press on the screen there is an air gap or something. anyway i was interested to know if anyone either had the same problem with their ipod, or if anyone recieved a replacement ipod that was damaged, id like to know what my options are before i go back to the store to complain, since they did me a favor to begin with