Starting with build 2015.2733, we have made font loading behavior more robust on iOS/Mac to match behavior on other platforms (namely if the string provided for the font doesn't match a name, we treat the string as a file and look for a font file by that string instead).
This change requires CoreText.framework to be linked manually to iOS Corona Enterprise and CoronaCards projects.
If you have an existing CoronaEnterprise/CoronaCards project, you may encounter the following error with daily build 2015.2733 (or later):
"_CTFontManagerRegisterFontsForURL", referenced from: Rtt::IPhoneFont::IPhoneFont(char const*, float, NSString*) in libplayer.a(Rtt_IPhoneFont.o) ld: symbol(s) not found for architecture i386 clang: error: linker command failed with exit code 1 (use -v to see invocation)
To fix the issue, simply add CoreText.framework to your application target in Xcode.