Originally Posted by finallygreen
Right...and I have a few of those working already...in fact, you can see a little "SPLIT" icon next to the game title in those cases (at least on the default theme).
So the one thing I saw suggested here that I haven't tried is to enable the BD-mirroring....I'll go give that a try and report back what happens.
One other thing is to delete any game data, from the game data utility for the game that doesn't work. Then install the newest game update manually.
You can get the latest game update in package from multiman. Go to the game in MM, press square or triangle, and choose update with X. It will download the latest game update and you can go back to xmb and install from install package files.