That's pretty damned cool, I honestly had no idea that existed!

How many times did my POD look perfectly fine locally, just to find that after a release to the CPAN (after a rigorous pre-release cycle) that I had to touch up POD issues.

Regarding the *testing* of links in POD (a bit off topic), in at least one of my distributions that uses links between several docs within the distribution (with some external to eg github pages), I took to using Test::Pod::LinkCheck (as an author/release-only test file). Works well, and advises loudly when I've messed up a POD link (which happens often). It will also find links that used to work, but no longer do.