I am getting freezes of my system and following messages happens more and more.

I have no zero length files in .Private
find $HOME/.Private -xdev -size 0c -exec ls '{}' \; | wc -l
0

[  360.184715] 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
[  360.302275] Valid eCryptfs headers not found in file header region or xattr region
[  360.302279] 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
[  360.303662] Valid eCryptfs headers not found in file header region or xattr region
[  360.303665] 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
[  360.306214] Valid eCryptfs headers not found in file header region or xattr region
[  360.306216] 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
[  360.331308] Valid eCryptfs headers not found in file header region or xattr region
[  360.331314] 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
[  360.332354] Valid eCryptfs headers not found in file header region or xattr region
[  360.332357] 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
[  360.334774] Valid eCryptfs headers not found in file header region or xattr region
[  360.334785] 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
[  360.336102] Valid eCryptfs headers not found in file header region or xattr region
[  360.336105] 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
[  360.368016] Valid eCryptfs headers not found in file header region or xattr region
[  360.368035] 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
[  360.381241] Valid eCryptfs headers not found in file header region or xattr region
[  360.381662] 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
[  360.389827] Valid eCryptfs headers not found in file header region or xattr region
[  360.389829] 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
[  360.887672] Valid eCryptfs headers not found in file header region or xattr region
[  360.887676] 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
[  360.887695] Valid eCryptfs headers not found in file header region or xattr region
[  360.887698] 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
[  360.887707] Valid eCryptfs headers not found in file header region or xattr region
[  360.887709] 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
[  420.357160] Valid eCryptfs headers not found in file header region or xattr region
[  420.357165] 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
Distributor ID:	Ubuntu
Description:	Ubuntu 10.04.1 LTS
Release:	10.04
Codename:	lucid