It's becoming almost a ridiculous sad joke.  Each new iOS release seems to bring a new round of calendaring bugs that cause havoc with Exchange and Activesync, and create no end of headaches for users and admins.

The latest example - the iOS 6.1, 6.1.1 fiasco - has taken it to a new extreme.

Apple needs to stop dripping with hubris about this stuff, and actually test their products consistently and properly.  The post-Steve Jobs downward trend is sad, and concerning.  One product after another is increasingly flawed.

Anyway </rant mode>

In the mean time - read about the iOS 6.1 mess here, then immediately go and update all your i-Devices to 6.1.2.  Then wait for 6.1.3 or 6.2 or whatever is going to fix the lock screen bug.  

Rapid growth in transaction logs, CPU use, and memory consumption in Exchange Server 2010 when a user syncs a mailbox by using an iOS 6.1 or 6.1.1-based device

iOS 6.1: Excess Exchange activity after accepting an exception to recurring calendar event

An Open Letter to Tim Cook

iPhone lockscreen can be bypassed with new iOS 6.1 trick