Comment 195 for bug 453579

I can confirm this bug with current karmic kernel:
 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 17:01:44 UTC 2009 x86_64 GNU/Linux

Steps to reproduce:

Download same file with 2 sources in parallel. I took Opera, and wget.

wget http://ubuntu.intergenia.de/releases/karmic/ubuntu-9.10-desktop-i386.iso
Opera saved to http://ubuntu.intergenia.de/releases/karmic/ubuntu-9.10-desktop-i386.iso-opera

Results:

roland@pdbxe100:~$ md5sum ubuntu-9.10-desktop-i386.iso
8790491bfa9d00f283ed9dd2d77b3906 ubuntu-9.10-desktop-i386.iso
roland@pdbxe100:~$ md5sum ubuntu-9.10-desktop-i386.iso-opera
3f979c279665cc7d6ead2c11b1060188 ubuntu-9.10-desktop-i386.iso-opera
roland@pdbxe100:~$ ls -l ubuntu-9.10-desktop-i386.iso*
-rw-r--r-- 1 roland roland 723488768 2009-10-28 22:14 ubuntu-9.10-desktop-i386.iso
-rw-r--r-- 1 roland roland 723488768 2010-01-28 15:35 ubuntu-9.10-desktop-i386.iso-opera
roland@pdbxe100:~$

Using cmp I found that there were NO differences?!
roland@pdbxe100:~$ cmp ubuntu-9.10-desktop-i386.iso ubuntu-9.10-desktop-i386.iso-opera

I wondered, and compared again via md5sum:
roland@pdbxe100:~$ md5sum ubuntu-9.10-desktop-i386.iso
8790491bfa9d00f283ed9dd2d77b3906 ubuntu-9.10-desktop-i386.iso
roland@pdbxe100:~$ md5sum ubuntu-9.10-desktop-i386.iso-opera
8790491bfa9d00f283ed9dd2d77b3906 ubuntu-9.10-desktop-i386.iso-opera
roland@pdbxe100:~$

So after accessing the files a second time, they seemed to have synced, flushed after delay .. or whatever.

This are my ext4 flags:
has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize

I created the filesystem manually via mkfs.ext4 /dev/sda4.