Why is my Magic Trackpad sometimes very choppy?

I have recently started having problems with my Magic Trackpad. I love the thing, but it is now jumping around so much that it makes it close to unusable. I may even have to switch back to a...gasp...regular mouse!
Here is what I have done to try to fix the problem:
Restarted my mac
Disconnected the Bluetooth pairing
Replaced the batteries (currently at 95%)
Moved further from my MBP
Moved closer to my MBP
I have a 27" LED display hooked up to my 13" MBP but otherwise nothing else.
Anyone have any ideas???

This from the linked article:
Certain external monitors and LCD displays: Certain displays may emit harmonic interference, especially in the 2.4GHz band between channels 11 and 14. This interference may be at its worst if you have a portable computer with the lid closed and an external monitor connected to it. Try changing your access point to use 5 Ghz or a lower 2.4 GHz channel.
http://support.apple.com/kb/HT1365
So, if you have control of the router, try a lower channel number.
Regards,
Captfred

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Why is my Magic Trackpad sometimes very choppy?

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