OK so everyone has heard the idea that the US Firmware version 2.0 was delayed because they found a way that the Jap 2.0 could be hacked and they were going to fix this.
Well anyways, why would sony release the US 2.0 Firmware with bugs(the background changer doesnt work)that were not in the Japanese update?
Because they want to hide the fact that there was a way to hack the Jap 2.0. This way they release 2.1 to fix the "broken" US 2.0 Firmware. In this update they include the fix to the background changer and it lets you update from the Jap 2.0, while also fixing the possible hole that s could use to hack the Jap firmware 2.0, effectively killing(at least partially) two birds with one stone.
Anyways this is just a crazy thought I had and thought I might share it.