As we learned recently, movie playback Blu-ray after having downgraded its PS3 is impossible, this is the firmware 3.41 must have changed. In fact it contains a bug that the developers trying to correct.

To avoid this, the method is simple, downgraded your console firmware 2.10 or below, the procedure is the same except that the 2.10 firmware does not change so official.

After that you just install via the XMB firmware 3.41 unmodified retail you can easily find on the Internet, as well as for 2.10.

Do not take a firmware above 2.10 because you squeeze forced to change the HDD temporarily (to be upgraded in laps3 3.41) because the console hangs when retrieving data.

This test was performed on a 60GB model so for those who want to try on a different model than it is at your own risk.