Parameters with multiple instances selected

The blog entry here says that you can select multiple instances and add a custom parameter to all at once, but that’s not working for me. Selecting multiple instances and then hitting the plus button does nothing.

On a related note, I wish when multiple instances are selected and they have custom parameters in common, those would show up in the custom parameter pane.

I’m working on a better handling for the custom parameters. But it will take some time.