Wired apple keyboard issue

I recently got the wired aluminum apple keyboard but have been having issues since the first day. The problem is that my black macbook (early 2008) from time to time registers that keys get stuck in the keyboard. For example some times I press the volume up key and the computer keeps raising the volume even after I stop pressing the key. It also happens with other keys such as the cmd and f5 keys. I have tried looking online for answers but so far I haven't been able to find a solution. Is the keyboard covered by apple's 1 year warranty and would I be able to take it to the apple store even though I got it from Best Buy? Thanks in advance.