Ubuntu Oneiric 11.10 x64 (fresh install) with Kernel 3.1.3-030103-generic:
[ 94.300994] Valid eCryptfs headers not found in file header region or xattr region
[ 94.300998] Either the lower file is not in a valid eCryptfs format, or the key could not be retrieved. Plaintext passthrough mode is not enabled; returning -EIO
Ubuntu Oneiric 11.10 x64 (fresh install) with Kernel 3.1.3-030103- generic:
[ 94.300994] Valid eCryptfs headers not found in file header region or xattr region
[ 94.300998] Either the lower file is not in a valid eCryptfs format, or the key could not be retrieved. Plaintext passthrough mode is not enabled; returning -EIO