I've noticed several audio drop-outs on some of the newer Disney movies (Monsters University, Brave, Finding Nemo) and on Total Recall (2012 remake). This has been posted extensively on blu-ray.com and at avsforum.com. The short version is that it bitstreamed audio in these Dolby TrueHD tracks results in audio dropouts on SEVERAL bluray player/receiver combinations. In my case, it's an Oppo BDP-83 into a Rotel 1560 (though I'm still closely contemplating a SP3). The generic solution is to put the player into LPCM mode, which resolves the problem (except with the Oppo BPD-83 for Monsters University).
I'm hoping the SP3 users here can post and let me know if they have had similar problems with these (or other) titles and what bluray player you are using. I'm hoping the SP3 is immune to this problem, but as of yet, I've not seen any consistent results.