Nicolas Cellier uploaded a new version of System to project The Trunk:
http://source.squeak.org/trunk/System-nice.201.mcz

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

Name: System-nice.201
Author: nice
Time: 24 December 2009, 3:14:18 am
UUID: 5cdb7480-4cda-4765-997f-e7c55fe5029c
Ancestors: System-ar.200

Use scaledIdentityHash for hashing

=============== Diff against System-ar.200 ===============

Item was changed:
  ----- Method: MessageTally>>hash (in category 'comparing') -----
  hash
  	"Hash is reimplemented because = is implemented."
  
+ 	^method scaledIdentityHash!
- 	^method identityHash!