GanttProject 2.5 has been downloaded more than 50k times in 4 weeks after the release, and we've received just a few bug reports, which means that either nobody uses it or that the quality of this release was really high. We prefer to think that the latter is the case :) Anyway, we have fixed 5 bugs, and published a maintenance update, so meet GanttProject 2.5.1.
Happy April scheduling!