I'm not sure what makes you so sure,

As for the causation, I was sure due to the perfect time correlation between the 2 events (as mentioned in the "solution").

you did write this post after updating the root node with the solution, or not?

I wrote this post right after the "update" but some time before the "solution".

downloading the tarball yourself and using the usual perl Makefile.PL; make; make test; make install commands.

I've bolded all the things in you quote that I'm now encountering for the very first time.
I'll add those to my list of things to lookup when I can.
(so annoying being a nub ^^)

Thx again.