Can't you just host your own copy of JQuery? If your web app needs version x.y.whatever, is there some reason why you can't just host your own copy of the library on the same servers the provide the rest of your web content?
I understand the convenience of using some CDN's copy of JQuery, but I'm unsure why it's anything other than a convenience. Maybe it's about money: "It'll cost us an extra $X per month in bandwidth fees to host our own version of JQuery." Maybe it's about user experience: "By hosting JQuery on our own site we add 100ms to page load times."
To the people who seem most unhappy about the version bump, can you describe how hosting your own version of JQuery would complicate your lives? Just so there is no ambiguity, I'm asking from a point of ignorance, not snark. I would genuinely like to read the answers.