I've just posted new versions of my NewConnectorsDemo and the 
RefrigeratorMagnets on Bob's Super Swiki.

These fix performance problems and potential walkbacks in the 
ConstraintMorphs.

You may get walkbacks if you switch to older versions of these projects (or 
try to use older versions).

To avoid this, after loading one of these newer projects (and without 
changing projects!), execute the following in a Workspace window:

NCConstraintMorph allSubInstancesDo: [ :ea | ea stepTime: 100 ].

I couldn't figure out how to attach this to the Project for execution (though 
it may have worked to put it in as a postscript on the change set, I don't 
know).

-- 
Ned Konz
currently: Stanwood, WA
email:     ned at bike-nomad.com
homepage:  http://bike-nomad.com