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It's a genuine security flaw. The Open Safe files tick box in Safari is the first thing you should turn off. Every security issue with Safari has involved it.

General tab in the Preferences. Where it says Open "safe" files after downloading, untick, and this goes away.
 
ok thanks for that - it looks like i had mine off anyway.
With this huge uptake of macs, i hope hackers dont turn on us mac users!
 
If you downloaded malicious code which needed access to 'important' system files to wreak its havok wouldnt you still be asked for your password ?
 
If you downloaded malicious code which needed access to 'important' system files to wreak its havok wouldnt you still be asked for your password ?
u dont need password to do some damage, system files are not the only ones that are important.
 
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