Raspberry PI Kernel data abort

Hi,

Sporadically the raspberry pi fails to mount its root mmc card. After power
off and power on again works most of the time. However there seem to be
also configurations that fail permanently. Unfortunately I have no image of
a sd card that fails on every boot.
Do you have any idea how to get more information whats going wrong?

For details and the full boot log have a look to:

http://www.freebsd.org/cgi/query-pr.cgi?pr=181601

Best regards,
 Martin Laabs