Some users are reporting some issues with IOS 6.1.1, so it looks like Apple will be releasing a new update. Primarily this new updated will address issues with Microsoft exchange and a passcode vulnerability.
9to5 Mac reports:
"According to a report from German language blog iFun, Apple is preparing to release iOS 6.1.2 early next week to address the much talked about Microsoft Exchange bug and passcode vulnerability. Apple already confirmed that both issues would be fixed in an upcoming software update, but iFun confirmed the update would land sometime before Feb. 21 based on its checks with carriers."