when being in the main window, pressing with the right mouse button on a movie and choosing "Fast Import" it always results in a notice that "the engine is working on the actors and can't be used for movies at the same time." (it's not the orignal text as I'm using the german language file and just tried to translate).
At this moment I do not have openend any other eXtreme Movie Manager window. The manual way via the "www"-button works great. Can you reproduce this bug?