APIC HALs were enabled by 0.4.15-dev-2720-g5ee0925 (and previous).
BootCD has 'Standard APIC' and 'ACPI APIC',
LiveCD has 'APIC ACPI'.
I cannot test amd64 BootCD, due to immediate crash at Stage 1. (Separate issue.)
QEMU 0.10.5, x86_64 VM
One additional log, compared to i386 build:
not a big deal at current state, but suspicious.