In order for your app to take full advantage of the iPhone 4 Retina Display, you'll need to add 2x resources to your iPhone project. If you're using SVN to manage your files, you'll be faced with something pretty annoying: $ svn add Default@2x.png svn: warning: 'Default' not found This was incredibly frustrating for me, no matter how I tried to escape it: single quotes, double quotes, backslashes,