TruMotion doesn't seem to work in 3D on my LG 55LM7600

Set the truMotion intensity value to the lowest value to reduce artifacts.
Tru motion is not available when in 3D because the TV can not display both screens and insert a black frame( or frame scan) after each frame in 3D and have any time left to insert an interpolated frame even with a 240Hz LCD TV.

That I am not sure of. It should not be a problem on displays higher then 240Hz but may be.

As far as i'm aware all of lg's 2010/2011 3d passives was the only passive 3dtv's on the market that had interpolation active in 3d.
I've had a few lg's and a few other passives from other manufactuers, the only reason i go lg for the last few years was because of motion interpolation in 3d .
Maybe lg have messed up, maybe you need to change settings in 3d, dno.
I do know i was looking at getting the uk's counterpart this weekend so this news is disturbing if it is'nt a user error or firmware error.