Following yesterday’s iBooks 1.1 update, users have discovered that Apple’s built-in dictionary is no longer working with some e-books, a problem traced by iLounge’s editors to a difference in the way iBooks 1.1 chooses dictionaries relative to versions 1.0 and 1.01. The new iBooks appears to be using the language identifier normally stored within ePub files to determine which dictionary to use for a given e-book. Some popular e-book…