I've got an ipod which doesn't work with 2.6.38 or later, unless I revert:

358f26d52680cb150907302d4334359de7dd2d59
52399b171dfaea02b6944cd6feba49b624147126

In the failing case, I get:

 sd 2:0:0:0: [sdb] Bad block number requested
 hfs: unable to find HFS+ superblock

in dmesg when I try to mount it.

Before 2.6.38, or with those commits reverted, it mounts fine and works so 
far as I can tell. (There's an Ubuntu bug report: 
https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/734883, which 
reports other people having similar results). I can test patches and 
collect information that might be helpful, if you have any ideas.

	-Daniel
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