I upgraded to iOS 6 and I'm extremely disappointed. Overlooking the battery drain issues, auto-brightness issues, and maps debacle, one thing that is really bothering me is the issues with excel. My work sends my schedules in a excel format (.xlsx i believe) and so far and the data values for the times are not being displayed correctly. I went into my gmail on the computer and checked the spreadsheet and everything was fine. This has never been an issue with iOS 5. Is anyone else experiencing this issue?