I picked up a 32LE5400 a couple weeks ago on a great bargain, and thought I'd post the few things I've noticed:
Flashlighting is present in the lower right but only visible on black and/or with very high brightness. I use auto energy-saver to reduce the brightness based on ambient light, so I do not notice it even on letterboxed video content.
TruMotion is totally sick. I am in love with the smoothness of the animation of all my video. Not just TV but also netflix and networked video files get the smoothing. I watched Yojimbo (Akira Kurosawa film) on Netflix and I could have sworn it was filmed last year. Occasionally files with odd frame rates (I have a few star trek episodes running at 27fps, I have no idea why) will show some judder with TruMotion on, so watch out for that.
One annoying thing I've noticed is there is no sleep timer button on the remote. You have to set it from the Quick Menu. And the Quick Menu is completely unavailable during Netflix or DLNA play. So if you want to put Netflix on a sleep timer, you have to do it BEFORE you start the Netflix application.
The DLNA capability is pretty good, but I have found some fairly large bugs with it:
1) it does not respect the pixel aspect ratio specified in a file's metadata, so if you have any anamorphic video files (Handbrake likes to make them), they will be stretched with no way to fix them other than reencode (believe me, I spent many hours looking for an easier solution).
2) It appears that any movie with AAC audio that is longer than 100 minutes will show "Unsupported Audio" and the sound will not play. A strange bug indeed, but a critical one.
3) Does not display soft subtitles embedded in MKV files. MKV support is the one area the TV beats an Xbox360 as a DLNA extender (and the xbox doesn't have problem 1&2 above, or anything of similar severity), but alas, most of my MKV files are encoded that way because they have soft subs.
Overall I'm happy with it, though very much looking forward to a firmware update that might improve DLNA playback.