Migrating from 2.7 to 2.8 - error with decoration chains

> Hello All,
>
> I've just upgraded to 2.8 (on a fresh squeak image) and after importing
> an existing 2.7 application, I am receiving and error in the decoration
> chain:
>
> ==
> MessageNotUnderstood: UndefinedObject>>contents
>
> Stack Trace
>    1.
>       thisContext
>           UndefinedObject(Object)>>doesNotUnderstand: #contents
>       self
>           nil
>       aMessage
>           contents
>    2.
>       thisContext
>           FVIndex(WAComponent)>>decoration
>       self
>           a FVIndex
>    3.
>       thisContext
>           FVIndex(WAComponent)>>decorationChainDo:
>       self
>           a FVIndex
>       aBlock
>           [] in FVEntryPoint(WAPresenter)>>withNextPresentersDo: {[:ea |
> ea withNextPresentersDo: aBlock]}
> ==
>
> I've followed Philippe's guide on
> http://article.gmane.org/gmane.comp.lang.smalltalk.squeak.seaside/10692/
>
> IS there something else I am missing?
> Newly created applications do not cause this issue, if that helps.
>
> Many thanks,
> John.
>
> www.pinesoft.co.uk
>
>
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>
>
>
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