This is my favorite SFW webpage on the entire Internet.

And I don't know if I could tell you why, exactly. I just think it's really interesting, and I love reading up on the various bugs in these relatively simple games. Almost every bug is like a neat little window into the ways some overworked Square programmer's brain worked (or didn't). Like using the weapon's index by accident instead of the crit rate.

Anyway, I just thought I'd share. If you're looking for some bathroom reading material, here you go, lol.

List of bugs and glitches (Final Fantasy Wiki)