i finally got it going on my trusty g4 (see specs below) it started to boot the dvd just fine. i have my macs set to always verbose mode (i like to see whats happening) and noticed that there were alot of errors, a ton really, all kinds of missing things that the boot os on the dvd was looking for but either couldn't find, or couldn't create because the boot disk was locked (very sloppy on apple's part if you ask me). and it seemed to hang on one of those error, so i kept rebooting, and it'd hang around the same place. well, i had to go somewhere and came back an hour later, and there the installer was waiting for me. it installed quick on a second hard drive i threw in just to see how i like leopard. but when it rebooted it went to the dvd again. so i yanked it out and it went right to 10.4. i checked startup disk prefs, and it was set to 10.5, i was confused. restarted with option held, and 10.5 wouldn't show up. so i turned it off, and unplugged my 10.4 disk. then it did start in 10.5, but it also seemed to hang, so i waited, and after 10 min, it came to life and the desktop showed up. the login update didn't fix it either. well, to cut out the details, i figured out that once 10.5 is installed, you can only boot from hard drives that are set as master on ide chains. if both drives are on the same chain, you can not boot from the drive set as slave. very unmac like. i've never had that issue before. so i had to dig out another ide cable and plug the other dirve into my card's second ide channel. now i have dual boot between 10.4, and 10.5 (i haven't even tried going to my old 9.2.2 boot system yet), but with 10.5 taking over 10min to get to the desktop, i'm not likely to use it hardly ever. and even though once 10.5 is up and running, it seems just as fast as 10.4, cpu intenisve apps (like handbrake) take long to do things. like in handbrake, a 25min video rip takes about 35min in 10.4, but almost an hour in 10.5. i haven't had much time to try anything else, menu meters works, islayer's sysstat works, as well as temperature monitor with the lite version and its widget. but tinkertool doesn't. i did find a bug with disk utility. i went to try to do a live partition like the help file said i could, but it failed, because it needed the disk to be formatted with a file system that supports live partition, like hfs+ journaled, which i did have it formatted in, but with 10.4, not 10.5, so that makes me think that even though they are named the same, they are not deep down, and apple should of said something about that (but now i remember that i had os 9 drivers installed on the drive too, which could be why. but again there should be something that tells you that those drivers will limit what you can do.). all in all, leoaprd is pretty, but untill i can figure out how to bring the boot time to back to around a min or less like it is in 10.4, i will be spending very, very little time with it.
ps- anyone installed it on a 1ghz g4 ibook yet? i have one for school, and don't feel like trying it on it unless i know it'll work as it has to be stable for my school work.