Nothing to worry about!
This is a normal thing to pop up on the tracking info. Apparently CP has updated their tracking info as of Jan 2013 with some more detailed automated comments, and this is just one of them. Every package you get shipped to you from out of the country will show this one...
Further processing means that it is sitting on a shelf somewhere, waiting for a Customs agent to finish his dougnut and coffee, most likely throw it through a sorting machine or x-ray to make sure it does not have any contraband, and then you'll see the tracking show that the post office has it.
I just had a big order come in from Tony (4 watches + 2 bracelets) in one box, so I was a bit nervous too, and it was released the same day, and delivered the following day.