Mac OS X v10.6.7: iTunes becomes unresponsive on MacBook Air (13-inch, Late 2010)

You may notice that after installing the Mac OS X v10.6.7 update on your MacBook Air (13-inch, Late 2010), when you open iTunes your computer may become unresponsive. In other situations, your computer may become unresponsive when you attempt to view protected content in iTunes, such as high definition movies.