Nicolas Cellier uploaded a new version of Kernel to project The Trunk:
http://source.squeak.org/trunk/Kernel-nice.343.mcz

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

Name: Kernel-nice.343
Author: nice
Time: 24 December 2009, 10:22:02 am
UUID: 155bf515-f41c-bc40-9dad-f98c01dfce8d
Ancestors: Kernel-nice.342

Smalltalk commandments #7:
'Thu shalt not invoke super when self could do the job'

=============== Diff against Kernel-nice.342 ===============

Item was changed:
  ----- Method: MethodDictionary>>includesKey: (in category 'accessing') -----
  includesKey: aSymbol
  	"This override assumes that pointsTo is a fast primitive"
  
  	aSymbol ifNil: [^ false].
+ 	^ self pointsTo: aSymbol!
- 	^ super pointsTo: aSymbol!