An old adage goes something like:
Test twice, deploy once.
But in my case, I should have tested thrice…
It appears I had inadvertently deleted a
' while I was updating the jQuery version number (at the end of line 483 in
admin-menu.php, to be precise…).
And thanks to Chip Bennett at WP, version 4.4.1 went live in the repo within minutes of my pushing it up (and begging for his help, yet again).
At any rate, version 4.4.1 is now live in the WP Repo, and appears to be working just fine…