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The 3.0.1 update patches a bug that could lead to Safari running arbitrary commands via CMD.EXE, a denial of service crash due to memory corruption, and a flaw that could lead to a cross-site scripting attack. Windows XP and Vista users can download Safari 3.0.1[or build 3.522 Beta] from FileHippo.
Only time will tell where this browser is really headed too - Since it's got loads of bad reviews in the Windows Front too. The problems are with the clarity of the webpage displayed [Anti-Aliasing not being perfect] to very slow loading of popular websites.