The unfortunate side effect is that the application is no longer a viewer but an image editor, which means your photos or images will be opened in read-write, instead of read-only. It is hoped that the red-eye removal tool will be the only thing it needs. I have used qiv for plain viewing, for example. It remains light and quick because it does one job perfectly well that the author has moved on and considered his little pet project no longer needs him to monitor for bugs or problem reports. He welcomes patches, but of course they might require some justification.