This issue has been fixed with commit https://github.com/ftilmann/latexdiff/commit/5319ccbacd617ec03a5ca1a48e678a60d33bb419on the latexdiff repository and will be included in next future release (probably 1.3.5)
- Bug#1078256: latexdiff: slight modification to a length p... Frederik Tilmann
- Bug#1078256: latexdiff: slight modification to a len... Frederik Tilmann