Seems to be that users of the Nexus S that you have been waiting to have Android 4.0 Ice Cream Sandwich and have not yet done so for various reasons will have to wait a little longer because of the problems that they stop does not arise from the new software. And that the matter is more serious than it can seem at a glance when you talk about a bug battery.
According to some reports and issues in various forums, terminals around the world that have been updated to Android 4.0 Ice Cream Sandwich come diminished battery drastically despite failing to provide intensive, having to do several refills throughout the day. The source of the problem, however, is simple, since apparently the screen was still keeping active despite have been switched off, causing a continuous consumption.
To avoid these hassles, Google has decided that the 4.0 upgrade freezes to avoid problems to anyone not yet updated for the time being mobile. It is not known for certain when an update that solves the problem, but seeing the impact that is having on the forums will be ready is expected engineers to give rush to try out for the next few weeks