I note one thing: The tab size in source and target segment is different (whil font typ and size are the same). See here:
It is clear that tab positions might differ, especially with any other font than Courier. But here the first word is the same and the next word in the target segment is at the "wrong" position.
Maybe this could be avoided by the (optional) masking of tabs, showing them as a tag (or a tag derivate) instead of a tab (or this famous tab symbol I proposed long ago). The the example above (with a kidn of padding at the left and right of this tag) would be:
Version tab Date tab Made by tab Description