Chris Muller uploaded a new version of MorphicExtras to project The Trunk:
http://source.squeak.org/trunk/MorphicExtras-cmm.148.mcz

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

Name: MorphicExtras-cmm.148
Author: cmm
Time: 8 May 2014, 11:05:49.021 am
UUID: 269c5efd-3e64-4e51-a003-20f0d989a2b6
Ancestors: MorphicExtras-tpr.147

Morphic, let Array class be responsible for the shared empty Array in the system.

=============== Diff against MorphicExtras-tpr.147 ===============

Item was changed:
  ----- Method: SimpleSliderMorph>>initialize (in category 'initialization') -----
  initialize
  
  	super initialize.
  	target := nil.
+ 	arguments := Array empty.
- 	arguments := EmptyArray.
  	minVal := 0.0.
  	maxVal := 1.0.
  	truncate := false.
  !

Item was changed:
  ----- Method: StringButtonMorph>>initialize (in category 'initialization') -----
  initialize
  	"initialize the state of the receiver"
  	super initialize.
- 	""
  	target := nil.
  	actionSelector := #flash.
+ 	arguments := Array empty.
- 	arguments := EmptyArray.
  	actWhen := #buttonUp.
+ 	self contents: 'Flash'!
- 	self contents: 'Flash' !