Just made the switch over to 10.1 and been running into non stop issues... One issue is with the Stip Map Index Tool, unlike the strip map tool from 10.0 the tool seems to be unable to calculate negative angles. This makes it unable to properly display with data driven pages, sometimes flipping my layouts almost completely upside down...If i were to present on of these maps my north arrow would then be basically pointing south? I've tried many methods of troubleshooting this issue and non seem to work, been using this tool for years never ran into issues till this new release.. So anyone else running into this issue or know how to solve it? Or should one just revert back to 10.0