How to make my workflows run again with Automator Runner after upgrading to Mountain Lion? After upgrading to Mountain Lion, I cannot run my workflows with Automator Runner anymore.

The option to do that in the context menu is still there, but nothing happens, no errors, no console logs. Opening them with Automator itself and running them from there still works.

How to make my workflows run with Automator Runner after upgrading to Mountain Lion?
You could always convert your workflows to Automator Applications if you want to be able to run them by double clicking. Open the workflow up in Automator, duplicate it, and save it with a File Format of Application, rather than the default Workflow: