Before I ask my question, I will give a short background in order to preempt any misunderstandings: The 10.5.5 Leopard Build on new 13" aluminum MacBooks is Build 9F2114. This is different from the most recent 10.5.5 Leopard Build on plastic MacBooks, which is Build 9F33. The 10.5.5 Leopard Build on new aluminum MacBooks contains drivers not found on the latest 10.5.5 Leopard Build on plastic MacBooks. Users who have tried to swap their plastic MacBook hard drive into a new aluminum MacBook reported that it doesn't work, and they get constant reboots right after the Apple logo. Inside my current plastic MacBook, I have an aftermarket Hitachi 7200 RPM 200GB hard drive. I want to buy a new aluminum MacBook for myself, but I want to remove the hard drive from my plastic MacBook and just install it into the new aluminum MacBook in order to not go through the hassle of reinstalling my many applications. As of today, this cannot be done because the plastic MacBook and the aluminum Macbook have different builds of 10.5.5. So, with that background out of the way, here is my question: Will the upcoming 10.5.6 update--that people with plastic MacBooks will be able to download--contain the aluminum MacBook drivers which are now only to be found in the special build of 10.5.5 that came pre-installed in the aluminum MacBooks?