See this: http://forums.macrumors.com/showthread.php?t=1628857
Some clowns have been posting this "killer text" on different forums - MacRumors had the problem earlier today - I and others were bitten by it - see my post in that link above. If you're using an iPhone, iPad or Mac and are seeing Safari or other crashes all of a sudden, this might be your problem.
An exploit that causes both Macs and iOS devices to crash was discovered yesterday, reports 9to5Mac. A specific sequence of Arabic characters causes an error that will crash any application that uses the WebKit engine in either Mountain Lion (OS X 10.8) or iOS 6.
When sent via text message, iMessage, Messages, or typed in Safari, the sequence of characters will cause apps to crash.
Some clowns have been posting this "killer text" on different forums - MacRumors had the problem earlier today - I and others were bitten by it - see my post in that link above. If you're using an iPhone, iPad or Mac and are seeing Safari or other crashes all of a sudden, this might be your problem.