Alright, so I'm a bit confused. After reading through this thread, it seems that some people have been showing that their new purchases still need the update, while others show that they don't need the update.
I checked with one of the serial numbers that was listed on the styrofoam that showed through the outside of the box, and it said that there was no update necessary. I then checked with the other serial number, and this time it said that there was an update. I just purchased this setup 3 days ago too! I would have figured they had this taken care of by now?
What confuses me though is in the thread, someone suggested using 300, with the intro with the lightning bolt and the moving streak of light, to determine whether or not it was having the problem. I used my PS3 Fatty, set it to Linear PCM. I then went to the Audio Setup, chose HDMI, and let it auto select all compatable formats. I think it was Dolby DTS, something else, and a huge sweep of Linear PCM formats. I then loaded up 300, selected the Linear PCM language from the Blu-ray's popup menu, and listened to the audio. It seemed to work exactly as expected.
Am I missing something? Has anyone received a false positive, where Onkyo states that there is an update, but the receiver already has the update? I'd hate to send the receiver in already to get it "upgraded", especially when I'm extremely OCD with my equipment, and would hate to get it back scratched up already!
**edit** I just checked the SN on the receiver itself, and it matches with the serial number that DOESN'T need an upgrade according to online. So why in the world would the other serial number that was on the styrofoam in the box show that it did, in fact, need an upgrade? The serial number that I saw was on a sticker on the rear of the receiver, towards the bottom.