Hi,
I've been seeing this odd spine bending problem for some time now. It does appear to be improved a little with the recent release (2.2.1.145) but it still occurs, sometimes even when the character is not moving around very much and standing fairly straight up:
Attachment:
SpineProblem.jpg [ 71.72 KiB | Viewed 25117 times ]
To me, it looks like the spine is too long for the body and that it has not choice but to bend, (usually to the actor's left for some reason.) You can also see the actor's hip tipping oddly to one side, even when standing straight.
If I make the actor shorter than the performer's height, this sometimes eases the spine problem but then this may cause other tracking issues with the arms and legs.
I've seen this problem appear whether the performer is me or my six year old daughter, so I don't think it only occurs with just one body type.
Finally, I did not see this problem back in version 1.0 so something was introduced in 2.0 to cause this problem.
If you have any questions, please feel free to ask, and thanks in advance for continuing to look into this problem.
G.