8.0 rc1 barfs during install

[Kathe]

i have an amd64 system which runs well with freebsd, openbsd and ubuntu.
with netbsd 8.0 rc1, it barfs while outputing the message below;
sdhc0: adma error, status ff
sdhc0: timeout waiting for mask 0x3 value 0 (state=0xffffffff)
sdhc0: command or data phase inhibited
sdhc0: timeout waiting for mask 0x3 value 0 (state=0xffffffff)
sdhc0: command or data phase inhibited