Likely like the iOS6 AV Foundation bug[0] back in November. It caused me quite a bit of headache, but the 6.0.1 bugfix was released quite quickly.<p>[0] <a href="http://labs.prx.org/2012/11/14/ios-6-0-devours-data-plans-causes-cdn-overages/" rel="nofollow">http://labs.prx.org/2012/11/14/ios-6-0-devours-data-plans-ca...</a>
Apple's got a history of noisy services. I remember when iOS 4.0.0 was blocked from the email service I was working for and many others because it basically spammed mail servers. A lot of our customers were mad that the software update disconnected them, but Apple released 4.0.1 quickly to address this.