Comment 44 for bug 38442

from the patch:

+ # If the screen res is 800x600 or 832x624,
+ # go into fullscreen so that the Next button doesn't get hidden
+ # under the lower launcher bar.
+ # for 640x480 and 768x576, fullcreen doesn't work, so
+ # leave it windowed, which also won't work, but may be
+ # more apparent.

Basically, make it usable in 2 cases where it currently isn't. (the 2 resolutions I could test)

I am sure there is a better palace for this code to live, like where the window widgit is first created, but I couldn't find it. another posibility is near
        elif isinstance(widget, gtk.Window):
            if name == 'live_installer' and self.oem_config: