Apple has issued an update to Safari that affects Safari 4 (Mac OS X 10.6), Safari 5 (Windows), and Safari 5 (Mac OS X 10.6). This security update addresses 27 issues and will bring your versions up to 5.0.3 and 4.1.3.
Here is a summary of those issues:
Description: An integer overflow . . .
Read More: Apple Makes Safari Updates Available


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