Comment 6 for bug 623708

I'm having what seems to be a similar problem.

I recently upgraded to Ubuntu 11 and a few days later my ext4 filesystem began misbehaving in a weird way.

In my home directory, many subdirectory names are duplicated verbatim. Here's an ls -F excerpt:
...
Desktop/
Desktop/
Documents/
Documents/
Downloads/
Downloads/
...
I can no longer access files in those directories (if I ls the directory, it appears empty; I can cd to it, but there's nothing inside).

Not all of the directories are duplicated/damaged like this, but most are. A few non-directory files are also duplicated in this fashion, so for example:
-rw-r--r--1 dgross dgross 95 2011-05-08 16:16 .dmrc
-rw-r--r--1 dgross dgross 95 2011-05-08 16:16 .dmrc
But I can read the contents of those files.

Because of the empty/damaged directories I can only start up in crippled recovery mode (too many essential files are impossible to find). Also many important content files are missing and I'd love to be able to recover them.

-----
> sudo fsck.ext4 /dev/sda1 -f -v
e2fsck 1.41.14 (22-Dec-2010)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information

250236 inodes used (0.84%)
5514 non-contiguous files (2.2%)
559 non-contiguous directories (0.2%)
# of inodes with ind/dind/tind blocks: 0/0/0
Extent depth histogram: 216180/243
23781951 blocks used (19.98%)
0 bad blocks
1 large file
181532 regular files
26200 directories
59 character device files
26 block device files
0 fifos
423 links
42407 symbolic links (33715 fast symbolic links)
3 sockets
--------
250650 files