Yaboot does not handle ext4 root partition?

[Rick Thomas <rbthomas55@pobox.com>]

I installed a squeeze" system (using the sid d-i netinst image) and  
just for fun I
decided to try setting root up as an ext4 filesystem.

All went well until the reboot into the new system.

It complained about the filesystem being corrupt and refused to boot.

I was able to boot into an ext3 partition by naming it in response to  
the
"boot:" prompt.

I have not tried reinstalling from the same CD with root as an ext3  
filesystem,
so I can't immediately rule out something besides root=ext4 as the  
causative
factor, but it sure seems like it's a possibility.

Anybody else seen this?

Rick

PS: I have filed this as Bug#559853