As always, it's important to note that these PS3 Debug / TEST updates will currently NOT install on a retail PS3, and so it is intended for examination and comparison purposes only unless you own a Dev unit.
For those curious, 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)
Is there any way to get just a file listing from the debug firmwares? I've been following the webkit browser updates, and there's been some question on how much of it is actually included with the firmware for apps like Hulu+ to use.