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New update is available today, on the opening day of Mac WWDC 2009, four updates with exiting Safari 4.0 final released.
Here are some snapshots of the updates:
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The reboot is required for this update.
One thing is interetsting. Since my default browser is Firefox and I have used Safari occasionally. After the update, I could not find out Safari from my Spotlight. I had to find it out from my HD's Application folder. After it is launched, then I can find it from Spotlight.