Thank you kindly krtaylor for a patch to solve:

Linked objects won't scale together properly, only the root object scales. 
This happens with scaling both up and down or inputting numbers in the edit dialog.

1 files changed, 1 insertions, 0 deletions

diff --git a/OpenSim/Region/Examples/SimpleModule/MyNpcCharacter.cs b/OpenSim/Region/Examples/SimpleModule/MyNpcCharacter.cs
index a9f7fb9..4ce68da 100644
--- a/OpenSim/Region/Examples/SimpleModule/MyNpcCharacter.cs
+++ b/OpenSim/Region/Examples/SimpleModule/MyNpcCharacter.cs
@@ -109,6 +109,7 @@ namespace OpenSim.Region.Examples.SimpleModule
         public event UpdatePrimSingleRotation OnUpdatePrimSingleRotation;
         public event UpdatePrimGroupRotation OnUpdatePrimGroupMouseRotation;
         public event UpdateVector OnUpdatePrimScale;
+        public event UpdateVector OnUpdatePrimGroupScale;
         public event StatusChange OnChildAgentStatus;
         public event GenericCall2 OnStopMovement;
         public event Action<LLUUID> OnRemoveAvatar;