Marcel Taeumel uploaded a new version of ReleaseBuilder to project The Trunk:
http://source.squeak.org/trunk/ReleaseBuilder-mt.130.mcz

==================== Summary ====================

Name: ReleaseBuilder-mt.130
Author: mt
Time: 12 April 2016, 5:53:34.162201 pm
UUID: 68b407c0-ded1-254b-b5ef-cd4d906cca5c
Ancestors: ReleaseBuilder-mt.129

Discard user objects.

=============== Diff against ReleaseBuilder-mt.129 ===============

Item was added:
+ ----- Method: ReleaseBuilder class>>discardUserObjects (in category 'scripts') -----
+ discardUserObjects
+ 
+ 	Player removeUninstantiatedSubclassesSilently.
+ 	MorphicModel removeUninstantiatedSubclassesSilently.!

Item was changed:
  ----- Method: ReleaseBuilder class>>prepareNewBuild: (in category 'scripts') -----
  prepareNewBuild: anMCRepository 
  	"ReleaseBuilderTrunk prepareNewBuild"
  	"Prepare everything that should be done for a new image build"
  	MCMcmUpdater updateMissingPackages: true.
  	MCMcmUpdater enableUpdatesForAllPackages.
  	TTCFont registerAll.
  	FileList initialize.
  	RealEstateAgent standardSize: 600 @ 400.
  	SystemVersion newVersion: self versionString.
  	SMLoaderPlus setDefaultFilters: (OrderedCollection with: #filterSafelyAvailable).
  "	Preferences outOfTheBox."  "<-- uncomment after #defaultValueTableForCurrentRelease is fixed up."
  	self
  		 setDisplayExtent: 800 @ 600 ;
  		 switchToNewRepository: anMCRepository ;
  		 setPreferences ;  "<-- remove this after defaultValueTableForCurrentRelease is fixed up."
  		 checkForDirtyPackages ;
+ 		 discardUserObjects ;
  		 configureDesktop.
  	Smalltalk cleanUp: true.
  	MCFileBasedRepository flushAllCaches.
  	MCHttpRepository clearCredentials.
  	Utilities setAuthorInitials: String empty.
  	Environment allInstancesDo: [ : env | env purgeUndeclared ].
  	Undeclared removeUnreferencedKeys.
  	Smalltalk garbageCollect.
  	[ self loadWellKnownPackages "<-- 4.5 is not ready for unloaded / reloaded packages" ].
  	Compiler recompileAll.
  	self
  		setProjectBackground: Color darkGray ;
  		openWelcomeWorkspaces!