Frank has a 65" LG 3D TV, but when he watches 3D from a device or a download, he gets a strange effect of the screen image shrinking down 1/3 of the size. It's like the entire screen image is letterboxed. Scott says it sounds like a defect in how the TV handles the streaming 3D content.
Scott says the worst kind of problems is intermittent issues because they're hard to diagnose. The chatroom says to update the firmware. Also the side by side 3D can get mixed up if the aspect ratio is not 16x9. The player software may have issues with mirroring between the player and the TV. It's a complicated chain of possible causes.