So we upgraded to 1.6. Bad move :)
Due to a problem with the API hooks we had altered our database to make the form value be 2048 characters (rather then the 200 default, you can't store a PGP encrypted entity in 200 characters..).
Anyhow, it was working great in 1.5.x but the update to 1.6 seems to have reset this field to 200 characters?
Boom, data, gone. No warning.
Was this intentional or a side-effect? Was it in a release note I missed? I had just posted to the forums that we were doing this since we could not get the data we needed and were told that 'if it works for you, it works' so we were super surprised to have this happen.