It did not seem to be any major changes from rc5 to final. We had been using rsync well before the failed cpio experment. But apparently a single character flag was omitted.
This ommision only affects tcz loaded onto the file system (ram) and only files with special flags setuid.
It is hard to be perfect. I never will be.
I am strongly considering inviting some of the more advanced community to participate in the private previews, as Team Tiny Core has lost half its size. The remaining team is quite stretched in our current project to transition to a single extension type. Send me a PM if you would be interested in participating.
Another thing to consider, is that this project is going through a transistion to a single extension type.
It is not the normal feature enhancements and upgrades, instead it requires adjustments in all areas of the project, from base code, to extensions, to website, documentation etc....
Transitional periods are the most demanding, sometimes it is like juggling too many balls. Errors and ommisions will occur. On the other hand, prolonged transitional periods are not desireable by the developers nor I suspect the community.
I can only ask for understanding from the community during this period.