Comment 161 for bug 453579

i wonder if some of the problems people are experiencing are due to a documentation bug.
http://www.ubuntu.com/getubuntu/releasenotes/910#Switching%20to%20ext4%20requires%20manually%20updating%20grub
makes reference to the ext4 wiki
http://ext4.wiki.kernel.org/index.php/Ext4_Howto#Converting_an_ext3_filesystem_to_ext4
the ext4 wiki under "For people who are running Ubuntu " recommends modified util-linux packages from
ftp://ftp.kernel.org/pub/linux/kernel/people/tytso/ubuntu-fixed-util-linux/
or
ftp://ftp.kernel.org/pub/linux/kernel/people/tytso/ubuntu-fixed-util-linux/util-linux-patch
since those referenced files date back to 07/17.2008 it seems like some of the problems could be from people installing old packages.