GUatu 0.872
When fed any invalid data, such as opening a PDF by
mistake, or an archive that contains additional
archives inside of it (ex: a comic book zip file with a
bunch of zipped volumes inside) my GUatu 0.872 exhibits
the following behavior:
* busy/wait icon replaces mouse cursor
* no feedback is given via error dialogs, although
complaints are visible in the CLI if started from an xterm
GUatu is not actually all the way hung at this point.
A user can continue to open a valid file through the
menus, which returns everything to normal.
Proposed change is to announce to the user that the
file is invalid via a dialog box and drop back to the
file dialog to try again.