The directory for jmf.properties should be /usr/share/jmf-bin/lib, not /usr/share/jmf/lib. With the current ebuild, jmfinit/jmfregistry says Exception on commit = java.io.IOException: Can't find registry file When I moved jmf.properties to /usr/share/jmf-bin/lib/jmf.properties, all problems with finding the registry file disappeared.
Created attachment 76063 [details, diff] Patch for ebuild, change the installation path of jmf.properties
Fixed in CVS. Thanks for reporting!