So a friend of mine bought himself a PS3 in march on the European launch (when I sat in the train on the way to Amsterdam on the same day).
One or two weeks later I lend him my copy of Fusion cause he never played the game before and got interested in the WipEout series.
I've no PS2 here anyway (and no PS3 either) so I don't need the game at the moment.
He began playing trough the first few leagues and went further in the game. The game had a few graphical glitches and crashed sometimes. Not very often and thanks to the auto-save you didn't lose too much of your progress when it happens. So the game had two squares of three on Sony's official PS3-downward-compatible-website and "Should play on PLAYSTATION®3 with some minor issues" what it actually did. No (big) problems at all.
And then there was this new update for the PS3. And guess what? The game doesn't even start. Nor it's listed on the site anymore. Is this the new way Sony wants to go with their updates?
Even non-homebrew users should keep away from Sony's updates it seems.
Good job, Sony!