Hello, I have recently download "Leopard-10.5.2-AMD-EFI-Rev2.iso" and burned it at 2x. I have a hp dv6748us laptop, you can find the specifications here: http://google3-cnet.com.com/laptops/hp-pavilion-dv6748us-turion/4507-3121_7-32815783.html?tag=specs
When I boot from the dvd, I get the usual apple symbol and the loading, however, after a few minutes I get a little cross over the apple sign and it continues to load but will not launch the installer. When you boot with -v I get a "still waiting for root device" error, which repeats itself every few minutes. Here are some pictures:
http://c-pj.net/leopics/IMG_1584.JPG
http://c-pj.net/leopics/IMG_1585.JPG
http://c-pj.net/leopics/IMG_1587.JPG

got the same prob here with rev2, doesnt matter wether i use sata or ide (same result).

That sucks, does anyone know of a fix? Maybe zephyroth or one of the admins/mods could help with this situation.

mine freezes after stating blksz 2048 doesnt match header size 512

thats almost exactly what i have, if anyone has a soloution, please share

Check your hardware. Most likely your hardware is not fully compatible especially if it is a notebook, its as simply as that. You can do some tweaks here and there to the BIOS, but you may likely end up with the same conclusion.