Oracle provides Java fixes directly to Mac users
The recent Flashback Trojan exposed a problem that OS X has with Java–specifically, that the development of Java on the Mac hasn't kept pace with the Java for Windows or Linux. Flashback uses an unpatched Java vulnerability to install itself on a Mac, a hole that Oracle, the developers of Java, had patched in Java for other platforms. Apple eventually fixed the Java vulnerability with a Software Update release, though you can't help but think that Flashback could have been avoided entirely with an up-to-date Java.
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Story added 30. April 2012, content source with full text you can find at link above.