Ok, this may be just my Kinde, but the update to 1.0.4 increased the functionality of the default dictionary. Before the update, when I would look up a word, I could view the definition of the word, but couldn't go to the next page of the dictionary. Sometimes the definition of the word would be more than one page. And I couldn't do much about it.
Now when I look up a word, I can go the next page, and the next page, even on to different entries from with-in the little dictionary window pop-up. Couldn't do that before.
So have I made any sense here? Sorry, it's early!