This is the first I've heard on this issue with any of those titles. Is your default setting on the player English (when first set up), and how is the player connected to the TV?
My problem is that I don't have English sound track on from some blue ray discs, so far had this problem with Terminator Salvation, Preciouse and District 9. French or Spanish sound track works, and English with commentaries. I have BD-P3600 ~months old. I initally had this problem only with one blue ray disc, it means Terminator Salavation, but recently had exactly the same problem with two recent as above blue ray movies.
What should I do in this situation? I am quessing that there is a problem with a decoding system or updates? But how can I fix it?