freebsd stable - Jan 2014 - endless ATA probe loop Thinkpad T42p / FreeBSD 10-STABLE

Hi,

after updating a Thinkpad T42p to 10-STABLE r261177 the laptop
no longer boots because of an endless ATA probe loop trying to
ATAPI_IDENTIFY the cd drive. A 10-STABLE installation built around
January 2nd also failed the ATA probe but continued to boot after
exhausting the retries, while the new version gets to the message
(aprobe0:ata1:0:1:0): Error 5, Retries exhausted
but then tries the probe again, never finishing the boot process.

Is there a way to get around this? 

Wolfgang