1. What's so different? How about the fact that there are three revisions that we know of alone dealing with backward compatibility. You can look that up very easily.
2. I never said they did or should make different firmware udpates. I said that demonstrably there are problems with newer firmwares and older systems. It's not just the official ps3 forums that reflect this. All of the troubleshooter sites, fixya, llama forums...anywhere people are talking about ps3 troubleshooting you'll see these issues. Like any hardware or software issue that you ever see on the internet, there are people who flat out don't believe, or think the people who are experiencing the issue are responsible, and like always, the fact that *you* don't have this problem doesn't mean it doesn't exist.
Again, it's very telling how much of a rorschach test a thread like this is.
Is anyone else reading this? I mean seriously.