I tried loading 1.9 and at the end of the firmware verification, the player announced the installation (main) was cancelled! It then proceeded to prompt for the Loader and the other, neither of which changed revision. Naturally, my playback result was unchanged.
I then tried going back to my pre 1.8 firmware -- 1.3 from Nov 19, 2007. It loaded fine and guess what -- no more blocking during the rolling credits.
So both my players are now again on 1.3 and I'm wondering what the problem is with the rev1.9 main, and when they're going to fix the "Planet Of The Apes" rolling credits blocking problem with the more recent firmware (don't know what rev it starts with, only that 1.8 exhibits it !)