I have found a very certain problem with my Nintendo Wii 4.3U. It is softmodded, so I am not sure if this applies to everyone. I installed the latest Netflix from the Wii Shop Channel. Occasionally I noticed that when I'm watching something, after a little bit it'll start buffering for like 15+ seconds and only play for like 10. Worked fine on my computer, so I thought about, what have I done different with the Wii? Well I started playing gamecube games recently and had my GC memory card and controller plugged in. I kept the controller plugged in and took the memory card out and everything has been fine since. Just now my videos kept buffering again and I thought maybe I was having wifi issues and I noticed I had my GC memory card in. I took it out and instantly the video started playing and hasn't buffered since. So to fix Netflix buffering problems, take out all Gamecube memory cards. Controllers don't cause a problem, but the memory cards do. I recorded proof of this problem. I am absolutely 100% sure this is what was causing my buffering issues. I don't know about yours, but I would suggest taking out the gamecube memory card.