After a year of dealing with the "pause and load" message (and often having to turn off/on, then FF to where I was), I give up on streaming Netflix through the BDP-S570. Since this thread began over a year and a half ago, it's pretty clear Sony is not going to fix this problem.
Got an Apple TV for Christmas; found the inexpensive "Ultra High Performance HDMI Switcher" favorably reviewed on Amazon and ordered it. My plan will be to use the Sony for Blu-ray DVDs only, and Apple TV for Netflix. (This HDMI switch is slick: needs no power input of its own, and will auto-switch to input 2 (Apple TV) when input 1 (Sony BD player) is turned off!)
I did almost the same...bought a Roku box and the problem was solved. Now the Sony is strictly for 3D Blu-ray discs...just in case anyone makes a worthwhile 3D movie that we can buy.
Oops, one little oversight in my plan. The switched (Sony BDP or Apple TV) HDMI output goes to my home theater projector. The sound however....
Looks like I also need a switch for the optical audio signal to (the single input of) my receiver. Oh well, the solution is still better than dealing with Sony's choppy Netflix signal.
For what its worth-
Just wanted to report similar issues with our Sony BDP S370 and choppy/intermittent streaming with Netfix. I have a solid 20+ Mb downstream connection. Sony player is directly connected to my router via new lan cable. Seems like Netflix streaming hiccup problems began several months ago (did not take note of date/ firmware update number)
As a stop gap, I originally I had planned to start mucking with Netflix's video quality settings (from the account settings page) when I realized that my other devices, (several PC's and one 'Droid phone) each stream just fine with great HD resolution and no hiccups. After extensive 'net searches for solutions to this seemingly Sony BDP - only problem, I went into the video setting section of the Sony Blu ray player and changed the "cinema conversion mode" to 30 fps rather than the previous 24. Additionally, I reset all settings. Sadly, I can't report which did the trick, but streaming in the BDPs370 works just fine for now at Netflix's best streaming settings. Currently testing Star Trek in HD and so far not a single hiccup and fast forward/rewind each work as they should with no delay.
Hopefully Sony will address this issue.
I figured out the problem with mine going all .8mpbs, then 10.8mbps, then .8 mbps, etc., was that I was using someone elses netflix account. Make sure you have your own account and arent sharing it with anyone.