Just to elaborate, they're thin metal tabs on the door spaced every few inches, that you match up and slide into the holes on the hard plastic part of the rubber strip piece. (See pics)
It's super easy to remove. Like Jon said, some tabs may break, but it's not that big of a deal, pbkid (Jack) used some type of sticky putty type stuff to hold mine in tightly. I subsequently got a replacement from a junkyard.
***DO NOTE- That strip has a metal core so it can be BENT VERY EASILY, and it's fairly hard to get it bent back EXACTLY right...so be gentle with it.
Here's pics.
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