Chris Muller uploaded a new version of Installer-Core to project The Trunk:
http://source.squeak.org/trunk/Installer-Core-cmm.380.mcz

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

Name: Installer-Core-cmm.380
Author: cmm
Time: 10 September 2013, 8:04:09.619 pm
UUID: ead30ebe-c094-4ba1-bc36-9f87b387dd78
Ancestors: Installer-Core-cmm.379

Remove call to unimplemented message.

=============== Diff against Installer-Core-cmm.379 ===============

Item was changed:
  ----- Method: InstallerMonticello>>unloadCleanUp (in category 'public interface') -----
  unloadCleanUp
   
  	SystemOrganization removeEmptyCategories.
  
  	"Until Mantis 5718 is addressed"
   	Smalltalk at: #PackagePaneBrowser ifPresent: [ :ppbClass | ppbClass allInstancesDo: [ :ppb | ppb updatePackages ]  ].
   	Smalltalk at: #Browser ifPresent: [ :bClass | bClass allInstancesDo: [ :b | b updateSystemCategories ] ].
- 	MCFileBasedRepository freeSomeSpace.
  	Smalltalk fixObsoleteReferences.!