F16 32b LXDE totally up to date (in a vmware vm)
Latest test version:  yum update --enablerepo=updates-testing livecd-tools
livecd-tools.i686                1:16.14-1.fc16                 @updates-testing

gives this:

...
0 old database entries were purged.
*********************************************************************************
I: -input-charset not specified, using utf-8 (detected in locale settings)
Size of boot image is 4 sectors -> No emulation
Size of boot image is 1912 sectors -> No emulation
genisoimage: Uh oh, I cant find the boot image 'isolinux/macboot.img' !
Error creating Live CD : ISO creation failed!


Worked fine until the most recent updates using all the same .ks files.



--
Randy