...[F]rom a security perspective, Apple's handling of these tools tends to lead to some problems. On a fairly consistent basis we see security vulnerabilities patched in these programs, but Apple doesn't include the fixes for days, weeks, or even months.
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As detailed by Landon Fuller, Java on OS X is vulnerable to a 5 month old flaw that's been patched in other systems....
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You can easily disable Java in your browser under the Content tab in Firefox, or the Security tab in Safari.
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