regression in ata/atapi wrt dma?

I just noticed that one of my burners in my homebox isn't set to dma mode 
anymore on boot (hw.ata.atapi_dma="1" is set in loader.conf.local):

acd0: DVDR <HL-DT-ST DVDRAM GSA-4081B/A104> at ata1-master UDMA33
acd1: CDRW <HL-DT-ST RW/DVD GCC-4120B/2.02> at ata1-slave PIO4

I dual-boot 4-STABLE on this box and there it is:

acd0: DVD-R <HL-DT-ST DVDRAM GSA-4081B/A104> at ata1-master UDMA33
acd1: CD-RW <HL-DT-ST RW/DVD GCC-4120B/2.02> at ata1-slave WDMA2

I guess I can rule out cabling going loose or similar things...

atacontrol cap says:

Protocol              ATA/ATAPI revision 0
device model          HL-DT-ST RW/DVD GCC-4120B
serial number
firmware revision     2.02
cylinders             0
heads                 0
sectors/track         0
lba supported
lba48 not supported
dma supported
overlap not supported

This is FreeBSD kiste 5.3-BETA4 FreeBSD 5.3-BETA4 #0: Sun Sep 12 19:45:10 CEST 
2004. Currently upgrading to latest RELENG_5, I'll follow up with any 
changes...

-- 
   ,_,   | Michael Nottebrock               | lofi_at_freebsd.org
 (/^ ^\) | FreeBSD - The Power to Serve     | http://www.freebsd.org
   \u/   | K Desktop Environment on FreeBSD | http://freebsd.kde.org