Sure, it could be nothing, and probably is. But what if all of these drastic changes we are seeing in Intel Atom-based Hackintoshes on 10.5.7 mean something about upcoming Apple hardware? Some points to consider:
10.5.1 - 10.5.6 there were little to no changes in Hackintoshes beyond what was stated in the update
10.5.7 updates bricked many Hackintoshes (it even gave a lot of real Macs some issues)
For those able to update without issue, some MSI users are reporting that battey life has been improved drastically