Linking as duplicate to Bug #616717 “Resized bitmap images are rendered differently by Firefox or Batik ('preserveAspectRatio' attribute not set)”: after manually inserting the missing attribute 'preserveAspectRatio="none"' to the scaled scaled images with width and height set to '1', the images in the SVG file render correctly e.g. in Firefox and Chromium (as well as in Inkscape).
Please add a comment here and revert the duplicate status if you don't agree and think these are different issues.
Linking as duplicate to Bug #616717 “Resized bitmap images are rendered differently by Firefox or Batik ('preserveAspec tRatio' attribute not set)”: after manually inserting the missing attribute 'preserveAspect Ratio=" none"' to the scaled scaled images with width and height set to '1', the images in the SVG file render correctly e.g. in Firefox and Chromium (as well as in Inkscape).
Please add a comment here and revert the duplicate status if you don't agree and think these are different issues.