Why mac track pad becomes crazy when iPod nearby becomes fully charged?

I have a macbook air and an ipod 4g. When the ipod is coming near to 100% charge, my macbook track pad becomes uncontrolable. Can anyone explain to me why. Disconnecting my ipod solves the problem.
Also why is it that when the ipod is charging, i am not able to use the screen whithout it activating another part of the screen?

I'll attempt to deal with a couple of your questions...
I can reduce my MacBook's speed to that of treacle by putting a big-enough
number into the Dashboard calculator. (For example, try 999,999,999 x
999,999,999 then press = more than 13 times.) It would be bad enough for
the calculator to crash, but it instead makes the MacBook need a restart.
Why would you use the dashboard calculator to figure this out. I don't think there are that many calculators that can figure that out too quickly. There is also a calculator program in the applications folder which might be quicker, but even that would bog down with 999,999,999 to the 14th.
My iPod nano hasn't seen heavy use and I fitted it with a soft plastic cover ?
shortly after getting it. Cosmetically it's fine but its performance is
gradually worsening.
Sometimes it crackles or the screen freezes or it refuses to play a track all
the way through. I use it with cheap headphones but they seem to work
well enough elsewhere (they don't crackle).
While it *****, I would restore the iPod to the original settings. You might get more answers regarding this in the iPod forum.
A few days ago I upgraded its RAM from 512 MiB to 2 GiB. Crucial delivered
promptly and I installed it myself. The new RAM seems to be recognized
and working, but the built-in keyboard and track-pad stopped working
immediately afterwards.
I can't seem to revive them this time. As you can imagine, it's pretty silly
needing an external keyboard and mouse for a portable computer. I have
an AppleCare warranty. What should I do?
Did you try the old Ram to see if the keyboard and trackpad are working with it? Also there is a setting in preferences to ignore the built-in trackpad if there is an external one being used so I would check that as well. Other than that you do have the applecare, so you can always get it checked out for free.

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