David T. Lewis uploaded a new version of System to project The Trunk:
http://source.squeak.org/trunk/System-dtl.374.mcz

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

Name: System-dtl.374
Author: dtl
Time: 12 September 2010, 3:43:07.895 pm
UUID: df2b5515-bcbc-4465-aa3c-5caa4e79d4fb
Ancestors: System-ar.373

MVC fixes by Florin Mateoc to address debugger opening, including low space interrupt and user interrupt in MVC.

=============== Diff against System-ar.373 ===============

Item was changed:
  ----- Method: Project class>>interruptName: (in category 'utilities') -----
  interruptName: labelString
  	"Create a Notifier on the active scheduling process with the given label."
  
  	self flag: #toRemove. "after restarting the user interrupt watcher process"
+ 	^ self current interruptName: labelString
- 	^ self current interruptName: labelString preemptedProcess: nil
  !

Item was changed:
  ----- Method: Project>>interruptName: (in category 'scheduling') -----
  interruptName: labelString
  	"Create a Notifier on the active scheduling process with the given label."
  
+ 	^ self subclassResponsibility
- 	^ self interruptName: labelString preemptedProcess: nil
  !