Not sure why but im getting a grayed out customize button during the lion GM install.
Any ideas?
Same here.
Did a restore of the InstallESD.dmg to an external USB hard drive partition, booted a mid-2010 MacBook off it after erasing the contents of the internal HD (to make sure the installer doesn't do an upgrade).
Also got the "Customize" button greyed out.
A bit annoying.... I usually disable all other languages and all printer drivers.