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I was trying to run VirtualBox on OS X when I got the error:

Failed to open a session for the virtual machine tinyXP.
Unknown error creating VM (VERR_SUPLIB_WORLD_WRITABLE).

According to this article, it is because the permissions on my /Applications folder are too broad. I checked, and I was actually very surprised to learn that the folder was in fact world-readable / world-writable.

drwxrwxrwx+ 164 root  admin      5576 Jun 26 22:27 Applications

So before I go changing them, I'm wondering if that is normal or if somehow they got changed?

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up vote 4 down vote accepted

That is not normal - I have

drwxrwxr-x+ 73 root     admin         2482 24 Jun 09:28 Applications/

There is a option in Disk to repair permissions which should change the Applications directory and others back.

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+1 for repairing permissions with Disk Utility. I do that once a month as a matter of course. – Philip Regan Jun 27 '11 at 10:29
That's great. Hundreds of things out of wack on mine. Thanks! – cwd Jun 30 '11 at 12:14

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