Warning: this module can break your site or cause major performance issues

Please note that this module changes the default cache class for the cache_field table and can have significant impacts and can cause issues if you use a pay-per-use key management solution such as Lockr.

After running this module in production for several weeks we continue to have recurring issues with this module encrypting cache fields and causing issues.

So, please be aware of this. I am not sure under what circumstances that the module does this, but even after resetting the field cache cache class, it seems to revert upon doing updates.