Installed this on my mid 2007 20" iMac from the App Store and it installed just fine in SL, Lion and ML (triple boot).
I installed this using the App Store on my hac running 10.8.4 and now it locks hard once it gets to the desktop, no mouse or keyboard and have to hit the reset button.
This was a fresh install from over the weekend using a fresh download of the 10.8.4 installer from the App Store and UniBeast 2.0.1 with MultiBeast 5.3.1 and a custom DSDT from toleda and a patched BIOS. Everything seemed to be working great playing D3 and SC2 and using Garage Band.
Sometimes it just gets to the wallpaper and a mouse frozen on the screen and sometimes I get the dock bar and top menu bar before it locks, the mouse works briefly.
Using a USB kb and mouse on a USB2 port.
Tried booting into safe mode (-x) but I just get the white screen before the desktop, tried using the GraphicsEnabler=No switch with safe mode but still just the white screen.
I will try a few more things and check back to see what others have found.
Thankfully I used CCC and Time Machine first.
Update:
I booted off my UniBeast stick with GraphicsEnabler=No and got in and everything seemed to be working fine.
So I opened Disk Utility and ran Repair Disk Permissions and it repaired three CoreGraphics files.
Now it is booting normally and everything seems to be working correctly.