Not sure about this LG unit, but on my Zalman passive you can see faint interlaced lines (even without glasses). With the glasses on every other line is blackened, and if you look closely you can definitely see it. At a normal distance it is not obvious but still visible if you try. Not a deal break for me, the 3D still looks nice. And this is just on the Zalman, one of the older models of FPR monitors.
Also, please make sure you read this thread regarding getting the wrong glasses with the monitor:viewtopic.php?f=43&t=14402
From all the (2D) images of the LG D2342P I've been able to find there are no visible lines. My main source of info on how this display looks is this (and the next) video: http://www.youtube.com/watch?v=w58QnsZY ... el&list=UL
They're in 1080p so you really get a good look at the display up close.
All I need is for someone to say 'Yes, the D2342P performs like the lw5600 series' or 'There is no visible aliasing'
Also, thank you for linking that thread, though I'm much more concerned with knowing what the monitor is like. From what I've read contacting LG about the wrong glasses is fairly painless, depending on which representative you get I suppose.