Comment 22 for bug 672019

'Preferences > Bitmaps: Oversample bitmaps' (default 2x2) does also influence the rendering of embedded / linked bitmap images on-canvas: with your example file, the narrow 1px-wide lines in the bitmap (not aligned to the SVG pixel grid) rendered with default oversampling (2x2) shows extreme blurriness at 100%, no oversampling or a higher rate does improve the rendering on-canvas at zoom level 100%.