I'm experiencing similar file system corruption issues with my Sandisk
Extreme 120GB SSD. All Ubuntu or Debian based Linux OSes I tried so far,
including Ubuntu 12.04, as well as Fedora 16 and 17, report file system
errors on bootup irregularly. After fsck and fixing the errors (or in
case it boots normally), I get various segmentation faults and/or CRC
errors for files.  Trying 5 or 6 different distributions with the same
results, I must conclude this may be a kernel issue.

I will update my SSD firmware in the hope that this solves the issue,
but I doubt since the updated firmware supposedly only addresses TRIM
issues (discard option in fstab).

All distributions worked perfectly fine when booting them from a live
USB stick. I checked my RAM using memtest86+ and it reports no errors.
Also smartctl does not reveal any problems with the SSD.

I managed to install and boot several 3.2 and later kernels from SSD,
but when using synaptic for updates and installs I eventually get
segmentation faults for synaptic, or the system doesn't boot anymore. It
looks like something is corrupting the file system.

Again, this happened with all new linux kernels 3.2 and above (see above
list of distributions I tried). I do not have any issues with the SSD
while running from a live USB stick. I can format the disk, install on
it, chroot into it and install or modify things, but I can't get a
stable system booting from the SSD. One of the common errors when the
SSD doesn't boot is efidisk read error. But it also doesn't work with
MBR formated SSD.

I wonder if SSDs can be used with kernel 3.2 and above? I didn't try
older kernel versions, though. Sorry I can't post more specific details,
but if anybody is interested to get output of debugging commands with
Ubuntu 12.04, I will try.

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https://bugs.launchpad.net/bugs/992424

Title:
  ext4 filesystem errors on SSD disk

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