Levente Uzonyi uploaded a new version of Kernel to project The Trunk:
http://source.squeak.org/trunk/Kernel-ul.559.mcz

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

Name: Kernel-ul.559
Author: ul
Time: 29 March 2011, 3:07:23.429 am
UUID: c77223de-0299-9646-bbf7-c68ba5f839e6
Ancestors: Kernel-ul.558

- use primitive 189 in Object >> (with:)*executeMethod: methods

=============== Diff against Kernel-ul.558 ===============

Item was changed:
  ----- Method: Object>>executeMethod: (in category 'message handling') -----
  executeMethod: compiledMethod
  	"Execute compiledMethod against the receiver with no args"
  
+ 	<primitive: 189>
- 	"<primitive: 189>" "uncomment once prim 189 is in VM"
  	^ self withArgs: #() executeMethod: compiledMethod!

Item was changed:
  ----- Method: Object>>with:executeMethod: (in category 'message handling') -----
  with: arg1 executeMethod: compiledMethod
  	"Execute compiledMethod against the receiver and arg1"
  
+ 	<primitive: 189>
- 	"<primitive: 189>" "uncomment once prim 189 is in VM"
  	^ self withArgs: {arg1} executeMethod: compiledMethod!

Item was changed:
  ----- Method: Object>>with:with:executeMethod: (in category 'message handling') -----
  with: arg1 with: arg2 executeMethod: compiledMethod
  	"Execute compiledMethod against the receiver and arg1 & arg2"
  
+ 	<primitive: 189>
- 	"<primitive: 189>" "uncomment once prim 189 is in VM"
  	^ self withArgs: {arg1. arg2} executeMethod: compiledMethod!

Item was changed:
  ----- Method: Object>>with:with:with:executeMethod: (in category 'message handling') -----
  with: arg1 with: arg2 with: arg3 executeMethod: compiledMethod
  	"Execute compiledMethod against the receiver and arg1, arg2, & arg3"
  
+ 	<primitive: 189>
- 	"<primitive: 189>" "uncomment once prim 189 is in VM"
  	^ self withArgs: {arg1. arg2. arg3} executeMethod: compiledMethod!

Item was changed:
  ----- Method: Object>>with:with:with:with:executeMethod: (in category 'message handling') -----
  with: arg1 with: arg2 with: arg3 with: arg4 executeMethod: compiledMethod
  	"Execute compiledMethod against the receiver and arg1, arg2, arg3, & arg4"
  
+ 	<primitive: 189>
- 	"<primitive: 189>" "uncomment once prim 189 is in VM"
  	^ self withArgs: {arg1. arg2. arg3. arg4} executeMethod: compiledMethod!