I've done an otool -L on all of the extlibs and I find no mention of the dylib otherwise I'd do a install_name_tool -change on it, which I've done on many other things. Here's the output exactly as you said it'd be.
Jassons-MacBook-Pro:frameworks jmcmorris$ otool -L /Users/jmcmorris/crea/Crea.app/Contents/Frameworks/FLAC.framework/Versions/A/FLAC
/Users/jmcmorris/crea/Crea.app/Contents/Frameworks/FLAC.framework/Versions/A/FLAC:
@rpath/../Frameworks/FLAC.framework/Versions/A/FLAC (compatibility version 12.0.0, current version 12.0.0)
@rpath/../Frameworks/ogg.framework/Versions/A/ogg (compatibility version 9.0.0, current version 9.2.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 159.1.0)
I'd suggest recompiling them myself but I imagine you'd like to get this fixed since it is likely others will eventually run into this once they start upgrading to SFML 2.3.
If you'd like you can add me on skype (baskinein) and we can work on this together.
Cheers!