Very rarely being every single release? You should not be using a changing library in any production code, you're just asking for problems.

If all you're using jQuery for is a document.querySelectorAll polyfill + the most primitive event handling, you're possibly safe, as those don't change terribly often...but at that point, you should probably be using a different library or a custom build of jQuery.

Unfortunately, it's the people least qualified to assess the safety of using an always-changing version who are most likely to do so.