jQuery Forum

This is intentional. There are no native events that are camelcase, so we're following an existing standard. We can update the docs for the widget factory to state this.

Dialog has a camel case callback (beforeClose), but no camel case events (as that would be impossible since it uses the widget factory).

You're correct, all of the drag-related and resize-related events are documented improperly. This has already been fixed in the documentation source (http://docs.jquery.com/UI/Dialog#events) and will be updated on jqueryui.com with the next release.

If somebody binds an event using camel case for eg. $(sel).bind("camelCase",handler) and then calls _trigger, it will never work. I couldn't find any documentation that says that the custom event name has to be in lower case only. I looked into the jQuery code, while attaching the event  it never stores the handler in lower case ( in jQuery.data (el,"events")). Shouldn't the behavior be same in both jQuery as well as widgetFactory)