Installed on my Gateway laptop. Seems to work great. In otherwords... I haven't noticed anything break? The last test kernel worked fine on all my hardware. This one does as well.
Although I had a minor sna-foo with acpi and controlling brightness. I knew they were depreciating acpi stuff in /proc and had moved it into /sys. Our kernels are holding on to /proc since it's available. This puts my lcd brightness in two locations. I opted to write my brightness scripts based on /sys so they would work now and in the future. My brightness isn't handled by bios. The keys trigger a acpi event that I need to catch and redirect to my scripts. Turns out they changed the api for brighness in /sys. Rather then echoing the desired value to brightness, you now have to echo the brightness level. So my scripts failed. But... on the bright (no pun) side. It really is a easier way. Especially if you want to use dbus and hal to discover and adjust instead of pure bash. The advantage of using the hal method is huge since the actual location of the brightness can be anywhere depending on the hardware. Hal will find it for you, so the scripts can be generic and work for all. And if you're a Hal hater, you can locate it for yourself and hardcode the path. I love the choices we have with Linux
Someday I'm going to write a howto about brightness keys and provide several ways to tackle them.
Yikes, got a bit off topic. Sorry