Following my successful attempt at dual-booting Mac Leopard with my Ubuntu Gutsy, I have also successfully patched it to the latest version 10.5.2.
Mac OSX 10.5.2 contains over 300 fixes, which enhance the stability, compatibility, and security of your Mac.
In your hackintosh, never use the inbuilt software update function to upgrade to 10.5.2. It will not work and will crash your system. If you followed my instruction to install your Mac OSX Leopard, you have to use the netkas way to update to 10.5.2. A more detailed explanation can also be found in the InsanelyMac forum.
PS: Before you start the 10.5.2 update, remember to backup all your extension files, and recover them after it has finished updating. My first attempt at updating (without recovering the extension files) resulted in the malfunctioning of my keyboard and mouse.