For this release I refactored the code involved with disk_io, it is more modular now and has fewer inter-dependencies.
I have disabled all of the --xxxxxx-security options in import_file (they controlled how scattered the file was on the disk). I plan to re-introduce them at some point in the future, but for now it stores files as contiguous as possible.
This will be the last version 29 release. I plan to change the chunk_info table in the next release. Also future package releases will be done under the "Objectify" project.
Please note that I am using the Bug and Feature Request trackers in the Objectify project: http://sourceforge.net/projects/objectify