I also have some DVDs like this, so that's why i'm thinking over this. I guess to set manually to "Full screen" is still a better solution than downgrade the whole Player app just because this issue.
If we talk about a "temporary" solution at this point, everyone can act as he sees fit, even if the "Full Screen" solution is inconvenient for me.
When you play pal files 16: 9 it is OK, then when you play 4: 3 files you have to turn off the full screen.
However, it is urgent to correct this bug with a new firmware.