So, my Applecare finally expired in January '10. Just before it expired, I had the palmrest/keyboard/trackpad replaced (among other things) for the THIRD time due to the well-known cracking issue. Now that it's expired, I notice that yet again there's a chip missing out of the lower right corner of the palmrest. I know that the newer palmrest/keyboard/trackpad (with the iTunes controls on the F-keys) from the later Macbooks is backward-compatible with mine. Are they any more or less durable than the palmrest from the late 2006 models?