I don't know if this is unavoidable, but...

Print this:

Smalltalk obsoleteBehaviors size 

which in the 3.2 image I have returns 15,
then do this:

Preference allInstances do: [ :pref | | target |
	target _ (pref instVarNamed: 'changeInformee').
	(target isBehavior and: [ target isObsolete ]) ifTrue: [
		pref instVarNamed: 'changeInformee' put: (Smalltalk at: target name 
ifAbsent: []). ] ]

Then print this again:
Smalltalk obsoleteBehaviors size

now it says 0.

-- 
Ned Konz
http://bike-nomad.com
GPG key ID: BEEA7EFE