In AS Pro Beta version for linux the "Batch export ..." from file menu don't accept dragged files from the gnome desktop (dragged with mouse from nautilus).
I'm using Ubuntu 6.06 LTS.
Just want to add myself to those having this problem.
Running Anime Studio PRO on Ubuntu 7.10 with nautilus as file manager.
I would suggest adding an "open" option in the batch render window together with the drag-and-drop capabilities since it now is impossible to do batch-render using linux.