-current ISO won't boot on VMware

[David Cuthbert <dacut@xxxxxxxxx>]

This is VMware 4.5.2-8848 on Windows, using the -current ISO from 20-Dec.

Booting normally, I see at the end:
acpi_cpu: throttling enabled, 8 steps (100% to 12.5%), currently 100.0%
ad0: timeout waiting for interrupt
ad0: timeout waiting for interrupt
ad0: enabling readahead cache failed
ad0: timeout waiting for interrupt
ad0: enabling write cache failed
ad0: 8192MB <VMware Virtual IDE Hard Drive> [17753/15/63] at ata0-master 
UDMA33
acd0: MODE_SENSE_BIG command timeout - resetting
ata1: resetting devices .. done
acd0: MODE_SENSE_BIG command timeout - resetting
ata1: resetting devices .. done
acd0: MODE_SENSE_BIG command timeout - resetting
ata1: resetting devices .. done
[and on and on...]


Booting in safe mode, I get:
ad0: timeout waiting for interrupt
ad0: enabling readahead cache failed
ad0: timeout waiting for interrupt
ad0: enabling write cache failed
ad0: READ command timeout tag=0 serv=0 status 58 dmastatus ff - resetting
ata0: restting devices .. ata0-slave: ATA identify retries exceeded
done
ad0: 8192MB <VMware Virtual IDE Hard Drive> [17753/15/63] at ata0-master 
PIO4
ad0: READ command timeout tag=0 serv=0 status 58 dmastatus ff - resetting
ata0: resetting devices .. ata0-slave: ATA identify retries exceeded
done
ad0: READ command timeout tag=0 serv=0 status 58 dmastatus ff - resetting
panic: biodone: bp 0xc18a9698 not busy -559038241
panic(c18a96c0,d0e9a800,d1f148f8,c159cd40,c028fa3c) at panic+0x84
panic(c046e477,c18a9698,deadc0df,c053e1b4,d0e9a800) at panic+0x84
biodone(c18a9698,d1f149b0,c18a96698,c053e1b4,c053e1a0) at biodone+0x3c
at_timeout(d0e9a800) at ad_timeout+0x1ac
softclock_handler(c053e1a0,0,0,0) at softclock_handler+0xe3
lwkt_exit() at lwkt_exit
Debugger("panic")
Stopped at      Debugger+0x34:  movb    $0,in_Debugger.357
db>

Ideas?

Thanks,
Dave