Running Mint 17 (derivative of Ubuntu 14). Runs Spriter R2 fine. Attempting to execute R3 gets a complaint: "error while loading shared libraries: libMagickCore.so.4: cannot open shared object file: No such file or directory".
I noticed that we seem to have moved on to libMagickCore.so.5 some time ago....
Also R2 runs fine, so it obviously doesn't need version 4.
Perhaps this is just a minor error in the compilation of R3?