boot problem with atapicam

Hi. Running -CURRENT on amd64.
If I include

 	device atapicam

in the kernel config file, the boot hangs for several minutes. Portion of 
boot log reproduced below. If I remove the atapicam line things appear OK 
as normal.

CURRENT from earlier this month (8 Jan) does not have this problem.

Who knows what to do to solve this?

Cheers
Michiel

[...]
ata0-master: pio=PIO4 wdma=WDMA2 udma=UDMA133 cable=80 wire
ad0: setting PIO4 on 8237 chip
ad0: setting UDMA133 on 8237 chip
ad0: 39205MB <Maxtor 6E040L0 NAR61HA0> at ata0-master UDMA133
ad0: 80293248 sectors [79656C/16H/63S] 16 sectors/interrupt 1 depth queue
ata1-master: pio=PIO4 wdma=WDMA2 udma=UDMA33 cable=40 wire
acd0: setting PIO4 on 8237 chip
acd0: setting UDMA33 on 8237 chip
acd0: <PLEXTOR DVDR PX-708A/1.02> DVDR drive at ata1 as master
acd0: read 6890KB/s (6890KB/s) write 6890KB/s (6890KB/s), 2048KB buffer, UDMA33
acd0: Reads: CDR, CDRW, CDDA stream, DVDROM, DVDR, packet
acd0: Writes: CDR, CDRW, DVDR, test write, burnproof
acd0: Audio: play, 256 volume levels
acd0: Mechanism: ejectable tray, unlocked
acd0: Medium: no/blank disc
ioapic0: routing intpin 1 (ISA IRQ 1) to cluster 0
ioapic0: routing intpin 4 (ISA IRQ 4) to cluster 0
ioapic0: routing intpin 6 (ISA IRQ 6) to cluster 0
ioapic0: routing intpin 9 (ISA IRQ 9) to cluster 0
ioapic0: routing intpin 14 (ISA IRQ 14) to cluster 0
ioapic0: routing intpin 15 (ISA IRQ 15) to cluster 0
ioapic0: routing intpin 17 (PCI IRQ 17) to cluster 0
ioapic0: routing intpin 20 (PCI IRQ 20) to cluster 0
ioapic0: routing intpin 21 (PCI IRQ 21) to cluster 0
ioapic0: routing intpin 22 (PCI IRQ 22) to cluster 0
GEOM: new disk ad0
acd0: req=0xffffff001e8c9980 TEST_UNIT_READY semaphore timeout !! DANGER Will Robinson !!
acd0: req=0xffffff001e8c9980 TEST_UNIT_READY semaphore timeout !! DANGER Will Robinson !!
ata1: reiniting channel ..
ata1: reset tp1 mask=03 ostat0=51 ostat1=00
ata1: stat0=0x00 err=0x01 lsb=0x14 msb=0xeb
ata1: stat1=0x00 err=0x00 lsb=0x00 msb=0x00
ata1: reset tp2 stat0=00 stat1=00 devices=0x4<ATAPI_MASTER>
acd0: setting PIO4 on 8237 chip
acd0: setting UDMA33 on 8237 chip
ata1: reinit done ..
ata1: reiniting channel ..
ata1: reset tp1 mask=03 ostat0=51 ostat1=00
ata1: stat0=0x00 err=0x01 lsb=0x14 msb=0xeb
ata1: stat1=0x00 err=0x00 lsb=0x00 msb=0x00
ata1: reset tp2 stat0=00 stat1=00 devices=0x4<ATAPI_MASTER>
acd0: setting PIO4 on 8237 chip
acd0: setting UDMA33 on 8237 chip
ata1: reinit done ..
ata1: reiniting channel ..
ata1: reset tp1 mask=03 ostat0=51 ostat1=00
ata1: stat0=0x00 err=0x01 lsb=0x14 msb=0xeb
ata1: stat1=0x00 err=0x00 lsb=0x00 msb=0x00
ata1: reset tp2 stat0=00 stat1=00 devices=0x4<ATAPI_MASTER>
acd0: setting PIO4 on 8237 chip
acd0: setting UDMA33 on 8237 chip
ata1: reinit done ..
pass0 at ata1 bus 0 target 0 lun 0
pass0: <PLEXTOR DVDR   PX-708A 1.02> Removable CD-ROM SCSI-0 device 
pass0: 33.000MB/s transfers
(probe0:ata1:0:0:0): error 6
(probe0:ata1:0:0:0): Unretryable Error
acd0: req=0xffffff001e8c9390 TEST_UNIT_READY semaphore timeout !! DANGER Will Robinson !!
acd0: req=0xffffff001e8c9390 TEST_UNIT_READY semaphore timeout !! DANGER Will Robinson !!
ata1: reiniting channel ..
ata1: reset tp1 mask=03 ostat0=51 ostat1=00
ata1: stat0=0x00 err=0x01 lsb=0x14 msb=0xeb
ata1: stat1=0x00 err=0x00 lsb=0x00 msb=0x00
ata1: reset tp2 stat0=00 stat1=00 devices=0x4<ATAPI_MASTER>
aacd0: setting PIO4 on 8237 chip
cacd0: setting UDMA33 on 8237 chip
ata1: reinit done ..
d0: req=0xffffff001e8c9390 TEST_UNIT_READY semaphore timeout !! DANGER Will Robinson !!
ata1: reiniting channel ..
ata1: reset tp1 mask=03 ostat0=51 ostat1=00
ata1: stat0=0x00 err=0x01 lsb=0x14 msb=0xeb
ata1: stat1=0x00 err=0x00 lsb=0x00 msb=0x00
ata1: reset tp2 stat0=00 stat1=00 devices=0x4<ATAPI_MASTER>
acd0: setting PIO4 on 8237 chip
acd0: setting UDMA33 on 8237 chip
ata1: reinit done ..
Trying to mount root from ufs:/dev/ad0s1a
start_init: trying /sbin/init