Hi,

crc16.ko.gz, jbd2.ko.gz and mbcache.ko.gz aremissing from linux-ext4 package. On can rebuild them from linux-source package (cd /usr/src/linux; make && make module ) then inster them in the kernel (insmod ./fs/mbcache.ko ./fs/jbd2/jbd2.ko ./lib/crc16.ko)

Hope that can help

Laurent