If i download an .nzb file into my downloads folder, it tries to pick it up and start downloading but then it either gets stuck on 'prefetching', or, it complains that there's no fileparts found, and it deletes the .nzb file from my downloads folder. reproduceable 100% of the time.
but if i drag and drop the same .nzb file that it had deleted and put into my trashbin, and drop it back in the usenapp main window, it starts to download it correctly, and does everything fine.