Thank you for taking the time to answer my report.
Just to follow up ... It appears that CONFIG_ACPI_PROCFS_POWER was set in the 2.6.24 kernel:
[ Sun 13-Jul-2008 20.45 eric ] ~ $ cat /boot/config-2.6.24-1-686 | grep CONFIG_ACPI_PROCFS_POWER
CONFIG_ACPI_PROCFS_POWER=y[ Sun 13-Jul-2008 20.45 eric ] ~ $ cat /boot/config-2.6.25-2-686 | grep CONFIG_ACPI_PROCFS_POWER
# CONFIG_ACPI_PROCFS_POWER is not set
