My /User directory permissions always changes… should I be worried? I've noticed that my /Users directory on OSX always gets changed to "rwxrwxrwx"

I'm not sure how this is being changed? Only just started happening

Could it be malware or such?
Install iTunes 11.2.1

Source: http://support.apple.com/kb/HT6251

Description: Upon each reboot, the permissions for the /Users and /Users/Shared directories would be set to world-writable, allowing modification of these directories. This issue was addressed with improved permission handling. For information on the general content of iTunes 11.2.1, see http://support.apple.com/kb/TS5434.