/var/log/messages -> Jan 6 11:20:42 iglu md: fsck.reiserfs(pid 383) used obsolete MD ioctl, upgrade your software to use new ictls. installed: sys-apps/mdadm-1.7.0, sys-fs/reiserfsprogs-3.6.18 I notice this since a while and it doesn't seem to harm, but I thought it's better to track it.
have you tried 3.6.19 ?
Yes, when I wrote the above report. The warning seems to be gone.
marked 3.6.19 stable then for x86