Error in capturing an Amazon Book (ID: 557349045)

I was trying to capture the following book in My Library:
http://www.amazon.com/Italian-Economy-1990s-ebook/dp/B000PLXE7K/ref=sr_1_19?ie=UTF8&s=books&qid=1269533209&sr=1-19

The book-blue-icon in the address bar was there, but a click to it, does not save the item. It shows only the beginning of the advise small rectangle in the bottom right (that for the other items tells that the item has been saved), without text and nothing else. The book -as you can check - is both for print and for kindle.

Specs: FF 3.6.2 Portable with Zotero 2.02 [latest versions at this time (25 march 2010)]
I am curious to have a feedback, which helps to find the culprit.

[I found already something: The link above refers to both the kindle and print version of the book. I went to the previous only Hardcover version, and the download works. Does this mean that the mix kindle-print Items cannot be saved?]
Thanks

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