Poser IK issues: bodyparts twisted

I'm using Poser 7.
I used IK many times before and in many anims. It's very useful when moving a figure by the hip or if you want a bodypart stay still while all the body moves.

But latley I'm experiencing very weird behaviours: first I pose figure with IK turned off on frame 2 and break spline, then i turn on the IK where needed, go on the next KF and pose the figure again...
But from now on any camera movement, or any other bodyparts move (not in IK chain) will cause an orrible "twist" of the IK bodyparts!!! It's a viewing flaw, because when i reclick (often more than 1 time) on camera controls parts go back to normal with a snap, but very very very very annoying!
And in anycase i found some parts, like hands if IK turned on on hands, in a totally wrong position...like twisted of 450° or similiar.

I tried not using IK at all and all is normal, but i need it in certain movements...

But all this never happened before the last month!
Has anyone had similiar issues and how solve them?

Thanks

You could try not animating the camera and see if that makes any difference - uncheck the option for animating camera on the parameter wheels window.

I did specified earlier, but I already don't animate cameras Deira...

It's very hard to say what is going wrong without seeing it - is it any better using Linear Interpolation throughout? Sometimes splinal interpolation can make things move in unexpected amounts.

usually i use linear when i want a part static or moving indipendetly from other KF. But this seems a video problem. If i save when twisted and reopen all is ok.
I can post a screenshot but if it never occured to you or others, Ill try to live with it...

Thanks anyway.

Update on my issue: I have it when I use "Inverse Kinematics" and "Use Limits" together only!!

I that case, moving a not-IK bodypart (an arm for example), all IK boadyparts will stretch and twist in a weird way (feet for example).