Today TeamSOS released Fix Tar v2 for PS3 version 3.56 and 3.60 Firmware.
Download: Fix Tar v2 for PS3
Here is the quote
I'm just bringing a little update for anyone that's messing around with 3.56 or 3.60 pups. Whenever a tar file is modified, it's permissions need to be set.
For all firmwares 3.55 or lower, it was one set of permissions. 3.56 and up use another. This is Kakaroto's Fix Tar command line application updated and tested working for use on 3.56 and 3.60 firmware tar files.
All credit goes to Kakaroto, all I did was change some values and compile it. Please note this is of only of use to developers and not beginner users.