Just upgraded my iPod touch to iOS 7.0.3 and \"HelveticaNeue-Italic\" seems to have disappeared. When I query on the phone with:
[UIFont fontNamesForFamilyN
This is a bug in iOS 7.0.3.
If you are explicitly using HelveticaNeue-Italic, then you can create it using this workaround:
UIFont* font = (__bridge_transfer UIFont*)CTFontCreateWithName(CFSTR("HelveticaNeue-Italic"), fontSize, NULL);
Note, however, that this workaround will only work on iOS 7; it is not deployable to iOS 6 (because CTFontRef and UIFont were not toll-free bridged on iOS 6). However, on iOS 6 you can just use your regular font lookup code.