[Seaside] Problem upgrading seaside from an existing image (Pharo #14438 and Seaside 3.0)

[Dave]

I've some problems to upgrade Seaside. If I start from a standard Pharo image
1.4 summer (#14457) and evaluate:

Gofer new
    squeaksource: 'MetacelloRepository';
    package: 'ConfigurationOfSeaside30';
    load.
(Smalltalk at: #ConfigurationOfSeaside30) load.

everything's fine, but if I upgrade from my image I receive a
SubscriptOutOfBounds :-(

My Version of Pharo and Seaside:
- Pharo #14438
- Seaside (3.0.7, I guess), from monticello browser I see my seaside
packages:
-- Seaside-Canvas (pmm.117)
-- Seaside-Core (NickAger.768)
-- Seaside-Session (pmm.157)
If you need to know other packages, I can show them


Log extract follows:

THERE_BE_DRAGONS_HERE
SubscriptOutOfBounds: 0
5 September 2013 9:26:27.448 am

VM: Mac OS - intel - 1084 - CoInterpreter VMMaker-oscog-EstebanLorenzano.155
uuid: c53d1f34-009e-425c-9f88-398f8d39c5e8 Apr 15 2012,
StackToRegisterMappingCogit VMMaker-oscog-EstebanLorenzano.155 uuid:
c53d1f34-009e-425c-9f88-398f8d39c5e8 Apr 15 2012,
https://git.gitorious.org/cogvm/blessed.git Commit:
043d256c0d39b78e04db8608c0ebfbf096223a3f Date: Sun Apr 15 14:18:12 2012
+0200 By: Guille <guillermopolito at gmail.com>
Image: Pharo1.4 [Latest update: #14438]

ByteString(Object)>>errorSubscriptBounds:
	Receiver: ''
	Arguments and temporary variables: 
		index: 	0
	Receiver's instance variables: 
''

ByteString(Object)>>at:
	Receiver: ''
	Arguments and temporary variables: 
		index: 	0
	Receiver's instance variables: 
''
.............


--- The full stack ---
ByteString(Object)>>errorSubscriptBounds:
ByteString(Object)>>at:
ByteString>>at:
ByteString(SequenceableCollection)>>last
GoferResolvedReference(GoferVersionReference)>>parseName:
GoferResolvedReference(GoferVersionReference)>>initializeName:
GoferResolvedReference>>initializeName:repository:
GoferResolvedReference class>>name:repository:
[:each | GoferResolvedReference name: each repository: self] in
MCHttpRepository(MCFileBasedRepository)>>goferReferences
Array(SequenceableCollection)>>collect:
MCHttpRepository(MCFileBasedRepository)>>goferReferences
[aRepository goferReferences asSortedCollection asArray] in
MetacelloGofer(Gofer)>>basicReferencesIn:
BlockClosure>>on:do:
........

Can you help me?
TIA

Dave



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