hi Ned

I do not understand why you remove the method 
WeakActionSequence removeSelector: #isReceiverOrAnyArgumentGarbage

while you need it 
WeakActionSequence>>isValid
	^self isReceiverOrAnyArgumentGarbage not

the changes seems simple even if I do not understand how there are
related to the impossibility to do 

"Fixes a bug that makes it impossible to say:

someObject when: #something evaluate: (MessageSend ...)"

stef















< I'm a bug-fixing machine! >

This post brought to you by the BugFixArchiveViewer, a handy tool that
makes it easy to comment on proposed fixes and enhancements for Squeak. 
For more information, check out the Web page for the BugFixArchiveViewer
project: http://minnow.cc.gatech.edu/squeak/3214 

< I'm a bug-fixing machine! >