Same thing here with the foam pads. I ripped one in half as soon as I tried to put it on an earbud. Fortunately, I stocked up on foam earbud pads from the local DollarTree a few months back, five pairs in five colours for one dollar. I bought three packages. They went onto the Sennheisers without any tearing, plus I can tell which pair is which by the pad colour.
Listening to "Autumn Leaves" by Cannonball Adderley, via my Zune80, at the moment. Too soon to tell if I like these better than the Phillips earbuds I have been using, but Miles' muted trumpet sounds pretty sweet, right off the bat.