Hi, I recently bought a late 08 aluminum macbook and have been quite happy with it but from quite some time I've noticed that while I'm on internet and on adium (where I noticed the most) the signal goes off for a couple of seconds and then it comes back. First i thought it was ok but it's been happening really often and is quite annoying since it happens several times a day and only happens to me and not anyone on my network (everyone else has pc`s and are also on wifi). So I wanted to ask.. is it possible my Airport card is failing? or is my router the one failing? and if it is so why is not affecting the other pc's? what should I do? thanks