For those who own PS3 Debug / Test consoles or are simply into collecting PlayStation 3 file leaks, recently PS3 Debug / Test Firmware 3.74 surfaced alongside version 4.00 from Sony's North American Press Web site.
If you didn't know, the address to their Press site is http://PressCenter.PlayStation.com/
and Sony offers free access to all members of the press there using *SCEA* / *SC3APR* to login and obtain the latest press releases and related files.
Finally, keep in mind these PUP updates will currently NOT install on a retail PS3, and so they are intended for examination and comparison purposes only.
We have 100% confirmed that running this updater on a retail PS3 will not damage it, however, it will give the following error before the installation completes: The data type is not supported. (8002F029)