0.51: Image is not shown in 100% zoom

[helmut]

When using 'Auto image size, large images only', small images are supposed to be displayed at 100%. This is not the case, instead the images are displayed with zoom factor 99% (displayed in the status bar).

Note:
This problem might be related with 0.51: Border line around image is one pixel off

[xnview]

I can't reproduce, small image are in 100% zoom