UbiFS regression(?)

UBI error: ubi_io_read: error -74 while reading 64 bytes from PEB 0:0, read 64 bytes UBI error: ubi_io_read: error -74 while reading 64 bytes from PEB 0:1, read 64 bytes
.....

root=ubi0:rootfs rw rootwait ubi.mtd=4 rootfstype=ubifs

beagleboard

2.6.35-beagle-32op-08909-g8428498

last commit: 842849896627701e4c07441f2c7519aeec771058

CONFIG_MTD_UBI=y
CONFIG_MTD_UBI_WL_THRESHOLD=4096
CONFIG_MTD_UBI_BEB_RESERVE=1
CONFIG_UBIFS_FS=y
CONFIG_UBIFS_FS_XATTR=y
CONFIG_UBIFS_FS_ADVANCED_COMPR=y
CONFIG_UBIFS_FS_LZO=y
CONFIG_UBIFS_FS_ZLIB=y