As we reported previously, users who switch away from the iPhone are having trouble with their phone numbers remaining tied to iMessage, causing them to miss SMS text messages from other iPhone users. Apple told Re/code that it has fixed a server-side bug that was partially responsible for the issue and that it is working on a software update to address the issue more fully. follow link
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Using Keyboard Commands While Screen Sharing
In Snow Leopard, screen sharing now properly transfers all keyboard commands to the remote server. For example, the Command-Tab application switcher switches applications only on the remote system's screen.
Apple Working on a Fix for the iMessage Trap