What this update brings to the table | this is not a security release. Support info: http://support.apple.com/kb/DL1614 Download: http://www.apple.com/itunes/download/ Note that updating the software reinstates MSCONFIG item iTunesHelper which is a known memory gobbler. For those that are familiar with MSCONFIG you may disable this item until your synch your devices - not recommended for those that synch their devices to their PC's frequently.
Apple iTunes 12.0.1 | non security release. http://www.apple.com/itunes/download/ For those that do not synch their Apple devices often - you may safely disable "iTuneshelper" from MSCONFIG - http://www.systemlookup.com/Startup/4978-iTunesHelper_exe.html
I stand corrected on what I said earlier on the security contents: About the security content of iTunes 12.0.1 https://support.apple.com/kb/HT6537