We should get rid of that CLI hack. Johannes was fond of it, but I don't want to support it. It isn't necessary; you can use fiji --run Make_Screencast.bsh and in fact that is better anyway because SciJava will handle the parameters etc. properly.
I love the cleverness, but now it causes problems with the new #! processor, and I don't want to add a hack to SciJava just to ignore it.