Blooming and sound lag
I just picked up the M552i-B2, and already I'm a bit irritated by some issues. The most noticeable is strong blooming when viewing dark scenes off axis at about 10 deg. You can literally see which panel is lit up and see rectangular outlines of darker and lighter areas, bleeding into the surrounding areas. In scenes that fluctuate between light and dark, you can see the panels dimming a split second after the scene changes (again, way more noticeable when slightly off axis). If watching something like the credits of a film, with white text on black background, the font looks like it all has a rectangular halo around it. It's really distracting.
Also, the sound and video is out of sync on some movies and channels. The built in lip sync feature only makes it worse, since you can only make the sound more delayed, and the problem is that it is already too delayed. This is noticeably worse using hdmi vs. component video, but still present in both.
Lastly, it's ability to upconvert non-hd signals is really sub-par. It's annoying that this is something that very few reviews address, but still plays a significant part in most tv-watching. When watching a non-hd dvd feel or a digital cable feed, it looks like I'm watching a poor quality streaming movie. Motion, in particular, is really poorly rendered.
Any thoughts on these issues? Did I just lose the panel lottery and get a bad set? I'm thinking about returning it and going with the Samsung H6400, which definitely won't have as deep blacks but shouldn't have these issues.