Yea.... I just had a look at that and I have been doing the wrong one for a long time!! Ermm... worrying.
I'd been doing the wrong thing too since I got the machine a week or so ago.
With any other laptop power supply out there, you pull the connector straight out of the power port and chances are pretty good that the connector is a decent size and you can grab it firmly and easily.
Leave it to Apple to miniaturize the connector and make it behave
unlike any other one out there. If someone has used other, possibly non-Mac laptops before, undoubtedly when they go to unplug the MagSafe they will instinctively try to pull it straight out of the power port as they would any other connector. Pulling this connector
straight out of the port requires more force than would be necessary w/ a non-magnetic connector. Given the connector is small the user ultimately gives the cord a little yank to pop the connector free from the port, leading to wear and tear, sparks and flame.
This is the wrong method, and Apple does a bad job at informing the user that this connector does not work like all the others out there. Glancing through the the "Everything Mac" booklet, there is nothing that I found that describes how to remove the MagSafe from the power port. This information should be around pages 68-69 in "Proper Handling" -- or better yet, around page 10 -- but is not (page 10 says "pull the plug, not the cord", but IMO should clarify
how to pull the plug). A little update to the docs that are shipped with the equipment might do some good. Of course this assumes people read them. ;-)