In an MIT Technology Review article reprinted on Mashable, David Talbot covers the emerging privacy concerns surrounding Apple’s storage of questions addressed to Siri. Apple says that the recordings are used only for Siri’s operation and to help improve understanding and recognition, but privacy wonks worry that the voiceprints could be used to identify the speakers. Where should the privacy line be drawn between providing services that require storage of personal information and worrying about Big Brother? follow link
Go Back and Forth Fast in Preview
If you're reading a PDF in Apple's Preview software, and you follow a bookmark or an internal link to move around within the PDF, you can quickly return to where you were by pressing the keyboard shortcut Command-[ (that's Command-Left Bracket). Or, you can choose Go > Back.
The command works iteratively, so you can go back to just the previously viewed page or if you issue the command again, to the page before that, and so on. There's also an equivalent Go > Forward (Command-]).
Siri Usage Generates Privacy Concerns