There are a few known bugs in 1.10 that have been fixed in master, but appear to be non-trivial to backport without fear of causing other regressions. The impact of these bugs is considered to be less than of a risk than rewriting the code. Zero Path Extents ----------------- A closed degenerate path is reported as having extents (0, 0) x (0, 0), whereas the expected value is (x, y) x (0, 0). This regression has existed since at least 1.2.