A satisfactory answer has not been found after searching on the topic “parenting” and so I post this question to the forum.
I am rigging a hand as per the instructions “Rigging a Hand or Foot” which are part of the Blender documentation. I also own the Blender 2.3 book.
I rigged the armatures for the right hand as per the documentation. It is tested and working correctly. The left hand presents examples of “weirdness” which I have read on the forum.
Example: The right thumb IK bone is parented to the hand.R bone and there is a dotted line connecting the two armature bones. The problems is the left hand.
The left thumb IK bone is currently a child of the second thumb bone. The problem begins when I change the parent, via the selection menu, to the hand.L bone. Instead of a dotted line joining the hand.L and IK bones, the IK bone enlarges and connects to the hand.L bone.
I check the right hand, hand.R, and the bones behave as per the instructions. The left bones, in the same configuration, are as described above.
Needless to say, I am left knowing nothing of the cause of this situation. I post this question here hoping one with knowledge or experience of this problem can help me.