The -48205 error is explained as Index Out Of Bounds. In this instance, the error occurs because there are no entries in the Personal Word List to browse. Once you add words to the Personal Word List, the error does not occur.
The Newton Word List contains all the words added to the Newton's memory. You can access the Personal Word List by bringing up the Newton keyboard and tapping the book icon in the lower left corner. Scrolling in the Personal Word List is done by tapping the letter that starts each words entry or tapping the up and down arrows at the bottom of the Newton's screen.