Ok I tried the test cases also without my changes - same thing. So I think its not my code, so I'll commit it, because it makes reading probably a big deal easier.
but never the less we'll have to investigate, why the following test cases don't work:
CubeSliderTest - no movement
KinematicLoop - no movement
TwoBodyBallTest - no movement
TwoBodyHingeTest - no movement
attached to this problem might be the issue, that I had to change that line in Geom.java:
this.parent_space = space;
this.parent_space = null;
please note, that I actually only rechanged that line to how it was in version 1.5 of Geom.java.
@hdietrich: why did you change it?
mmh I just noted, that in TwoBodyBallTest, it doesn't print "step". Maybe simply it's not stepped.