In the finalizationProcess method the last element of
FinalizationDependents gets referenced by the block
variable weakDependent (see below). Since this is an
endless process, this last element is never garbage
collected. 

A simple way to fix the bug is by niling
the variable. Here is the code:

finalizationProcess

	[true] whileTrue:[
		FinalizationSemaphore wait.
		FinalizationLock critical:[
			FinalizationDependents do:[:weakDependent|
				weakDependent isNil 
					ifFalse:[weakDependent finalizeValues.
						weakDependent _ nil "*** FIX ***"].
			].
		] ifError:[:msg :rcvr| rcvr error: msg].
	].

Also note that changing the method does not solve the
problem since the original process is still alive. One needs
to evaluate some expressions taken from the initialize method:

	FinalizationProcess notNil ifTrue:[FinalizationProcess terminate].
	FinalizationProcess := [self finalizationProcess] newProcess.
	FinalizationProcess priority: Processor userInterruptPriority.
	FinalizationProcess resume.

/leandro