hmmmm, interesting, i have exactly this problem in the latest version.
I am switching between 2 different toolbars, when i switch the event handling gets lost.
It seems that setting the "ConfigurationPath" property in the "Editor1_PostBackCommand" event causes the events to be dropped.
If i set the same property on the during the initial page load it works fine. If i try to set it on subsequent postbacks, the toolbar is set but the events do not seem to be wired up!
Have you any sugesstions?