Another fun issue in OS X HFS+ happens due to unicode normalization; any filename containing an ignorable unicode character is first normalized:<p>cat &#x2F;etc&#x2F;passwd`python -c &#x27;print &quot;\xe2\x80\x8c&quot;&#x27;`<p>This led to a security issue with Git (<a href="http:&#x2F;&#x2F;git-blame.blogspot.com&#x2F;2014&#x2F;12&#x2F;git-1856-195-205-214-and-221-and.html" rel="nofollow">http:&#x2F;&#x2F;git-blame.blogspot.com&#x2F;2014&#x2F;12&#x2F;git-1856-195-205-214-a...</a>) and one in Apache a few years earlier.