Tested MiniProfiler working back to jQuery 1.4.0. Though, I don't think we want to support that far back. Its probably safe to require a minimal of whatever version MiniProfiler bundles itself, thats 1.7.x. I feel pretty confident that 1.9.x, the last 1.x version of jQuery, is going to work fine in the future. So 1.7.x to 2.x seems like a good version constraint.
I removed useExistingJquery from a few spots in the ruby code, but I'm not sure about the .net code path. It'd probably be good to ensure that any existing configuration code setting useExistingJquery doesn't explode, but is just silent.
Ensure existing jQuery is 1.7.x < N < 2.x
Deprecates useExistingjQuery option
I also tend to aggressively upgrade our code to the latest jquery and sometimes unreleased versions. So you'll definitely see some patches from me if 1.9.x ends up having issues with MiniProfiler.
I wonder if we want a stub and deprecation notice so we don't break apps for the next release?
I already stubbed the ruby version, but it doesn't do any sort of verbose warning. For ruby, its pretty easy:
warn "MiniProfiler.config.use_existing_jquery is deprecated"