Lenovo T61: acpi-support upgrade from 0.96 to 0.98 broke suspend

Binary package hint: acpi-support

After a recent acpi-support upgrade (to 0.98), resume from software suspend on my Lenovo T61 leaves me with a mostly blank text screen with some blinking characters in strange colours. The keyboard is mostly dead (Ctrl+Alt+F1 does nothing, Caps Lock does nothing, Ctrl+Alt+Backspace does nothing, Alt+SysRQ works).

I also noticed new ACPI error messages in /var/log/syslog with the timestamps matching failed resume times. These never appeared before:

Sep 1 12:21:51 platonas kernel: [17221.232000] ACPI Error (evgpe-0705): No handler or method for GPE[ D], disabling event [20070126]
Sep 1 12:21:51 platonas last message repeated 119 times
Sep 1 12:21:51 platonas kernel: [17221.236000] ACPI Error (evgpe-0705): No handler or method for GPE[ D], disabling event [20070126]
Sep 1 12:21:51 platonas last message repeated 120 times

(there are many more repetitions)

Downgrading to acpi-support 0.96ubuntu1 fixes the problem.

My /etc/default/acpi-support looks like this (with the comments and blank lines removed):

ACPI_SLEEP=true
ACPI_HIBERNATE=true
ACPI_SLEEP_MODE=mem
MODULES=""
MODULES_WHITELIST=""
HIBERNATE_MODE=shutdown
LOCK_SCREEN=true
STOP_SERVICES=""
RESTART_IRDA=false
ENABLE_LAPTOP_MODE=false
SPINDOWN_TIME=12

For completeness' sake, my kernel is 2.6.22-10-generic, and I've added acpi_sleep=s3_bios to the kernel's command line.