Since the web server is not case-sensitive, but the dojo loader is, I am getting a "multipleDefine" error from the dojoLoader if I try to reference "esri/tasks/Query" in my own AMD modules.
I can work around the problem by referencing "esri/tasks/query" in all of my code, but this is contrary to the documentation.
It's an error in the documentation, you should be using esri/tasks/query (lowercase "q"). We'll get this fixed next time we update the docs (should be in the next couple of days, if not sooner).