++. There was a pretty long period of instability between those releases and the current code base which has finally become smooth again. Any number of module version issues in plugins, Moose, parent classes, and more cause problems in between. The new book is generally better and Cat 5.8 is different enough from 5.7 that it's probably what you (the OP) should be reading.
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> switch to a release from the same time period
or alternatively someone interested in selling the book should upload erratas and new code-examples to it's webpage...(?)
UPDATE: Or at least a warning about the applicable versions of catalyst...
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