Well, so far, I've played a lot with PS3 (movies and games) and Tvix M-6500A (movies).
No problems, no drop-outs, in bitstream and LPCM. However, I can't say about the surround swap as I still need to place them as they should be and haven't tested that part, but I suppose that the problem is present as this was confirmed by Onkyo.
Also, the receiver doesn't get hot, even in hot days after hours of use, thanks to the 140mm exhaust PC fan on the top.
I've ordered a 100' 16 AWG speaker wires from monoprice to upgrade from the 24 AWG included in the package.
As arpstorm said, I am very satisfied with the performance of this HT, especially for the price.