Sony BDP-S300 and The Mummy

[MrEggMan]

So, I rented The Mummy, put it in my player and the film doesn't have any sound. The menu does. But the film itself is silent.

I've got a Sony BDP-S300 with the most current firmware. Do you have any idea why this would be happening? If it's an issue of The Mummy being a new disc with some new-fangled feature that my player won't read...do I have this to look forward to with my player? It's not even a year old and the thought of needing to be careful about which discs I buy makes me a tad hostile.