Implement error cache
Implement error cache

git-svn-id: dc4cfb1ffefb79ebebcbc43438ae027ec2b8a92a@6 ff509d18-21b0-403c-84e0-5236789433d0

luispedro/milk,pombredanne/milk,pombredanne/milk,luispedro/milk,pombredanne/milk,luispedro/milk