Interesting, no recovery is included so I suppose the "Disable Recovery Flash" is stopping something it shouldn't.
Thanks for the info.
Added a warning to the OP. There should be no need to flash the separate SuperSU zip.
It's giving me this choice every time I flash a .zip, it's not just when I flash 4.3. Flashing a zip that installs aosp browser, dark version of email, etc, always ends up there.
Thanks for making these zips! It makes it so easy to install 4.3