I am afraid that the back bar obscuring the ticket is something that
can only be solved in the midlet, because it seems to compute the
available space for drawing/scaling the ticket on the canvas in the
wrong way.

A Maemo device has 800x480 pixels in landscape mode. If you
don't hide the Maemo top bar, you have 800x424 pixels available
for the midlet (including the blue bars at the top and bottom).
Excluding the blue bars you have 800x348 pixels available.

There are basically two types of going full screen:
-one that hides the Maemo top bar (because the Qt4 application
goes full screen)
-one that hides the blue bars (because the midlet goes full
screen) at least for Canvas or GameCanvas widgets. This is what
Opera Mini does.

For the first option, there is a short-cut (Ctrl+Up), but the latter
would need to be controlled from within the midlet itself :-(

About the grey bar: yes, I have been mainly testing on a real
N900 device lately (as the emulators are dog slow). I was almost
expecting that the mime type associations would not be working
on the N9, as MeeGo seems to be putting things in different places.

Davy