the following patch was just integrated into master:
Author: Marc Jones <marcj303(a)gmail.com>
Date: Tue Jun 28 14:30:05 2011 -0600
Libpayload needs to clear the bss region.
Libpayload shouldn't count on coreboot or other payloads to clear memory. This
fixes problems with payloads being loaded after or on top of each other.
Signed-off-by: Marc Jones <marcj303(a)gmail.com>