Since last version (36.1), when copying many titles for pictures, the process stops (see picture annexed). After forsing the app to close and reopening, everything is ok.
Ensure you have "Use watchdog" ticked under Preferences->Advanced. This will trigger jAlbum to produce a log file in case the user interface hangs for over 20s. Please pass that file if this happens again. This will help me see where jAlbum gets stuck.