Nicolas Cellier uploaded a new version of System to project The Trunk:
http://source.squeak.org/trunk/System-nice.300.mcz

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

Name: System-nice.300
Author: nice
Time: 27 March 2010, 5:57:01.141 pm
UUID: 7ede2278-e31b-40c7-95b4-6533284e97c2
Ancestors: System-nice.299

1) replace un-implemented Preferences suppressCheckForSlips with existing Preferences checkForSlips ( http://bugs.squeak.org/view.php?id=7483 )
2) add a postscript to clean-up obsolete MethodProperties

=============== Diff against System-nice.299 ===============

Item was changed:
+ (PackageInfo named: 'System') postscript: 'Utilities postRecompileCleanup.'!
- (PackageInfo named: 'System') postscript: 'nil'!

Item was changed:
  ----- Method: ChangeSet>>mailOut (in category 'fileIn/Out') -----
  mailOut
  	"Email a compressed version of this changeset to the squeak-dev list, so that it can be shared with everyone.  (You will be able to edit the email before it is sent.)"
  
  	| userName message slips |
  
  	userName := MailSender userName.
  
  	self checkForConversionMethods.
  	message := Cursor write showWhile: [self buildMessageForMailOutWithUser: userName].
  
  	MailSender sendMessage: message.
  
+ 	Preferences checkForSlips ifFalse: [^ self].
- 	Preferences suppressCheckForSlips ifTrue: [^ self].
  	slips := self checkForSlips.
  	(slips size > 0 and: [self confirm: 'Methods in this fileOut have halts
  or references to the Transcript
  or other ''slips'' in them.
  Would you like to browse them?'])
  		ifTrue: [self systemNavigation browseMessageList: slips name: 'Possible slips in ' , name]
  !