I have a spreadsheet of all my cardio workouts. It's fairly simple but a little large since it goes back to 2004. On my Mac Pro it's about 750KB. When I make changes and save/export to iWork file on my iPad it would crash about 1/2 way. Reset and it finely worked although it takes over 10 minutes to export. When I connect and save to my Mac Pro the file size has ballooned to over 8 MB. Also some of the formatting is wrong. Obviously Numbers on the iPad is corrupting and/or can't handle a file this size. Have others had simular problems using larger files? Had to use Time Machine to restore file since the iPad/Numbers screwed the file up.