I'm posting this only after much Googling and searching of Dojo forums for a solution to my problem. I re-implementing a prototype web application using Dojo. (The prototype uses no JavaScript framework.) I'm a Dojo noob.

This problem surfaced when I upgraded to Dojo 1.2.0 from Dojo 1.1.1.

Problem description: for custom widgets utilizing ondijitclick, I'm getting double onclick handler invocations with Dojo 1.2 only. The key events (keyup and keydown for space and enter, respectively) work correctly in all cases.