Problems I Have Encountered
Unique Values in Index Grid Field
Can manually edit attribute table
Sometimes need to restart whole arcMap document in order for error message to disappear
Crashing when Exporting, Printing or Indexing whole series
Indexing - Mapbook allows you to index your map pages but when your pages are very large you need to have a smaller grid within your map page so features will be easier to find. This problem was solved by downloading a macro that ran in VBA that used the data frame index grid. If you would like more information about this macro please feel free to contact me.
Caroline Dunlap firstname.lastname@example.org 843-676-8600 ext. 61429
You can find many ESRI Help Forums for Mapbook As well as the Google Code arcmapbook Page discussed earlier.