I've found another small [possible] bug similar to the previous one I've reported:
When I change the font size using the pinch-to-zoom option (this is, using the touch screen), then following I clic the right of the screen to go to the next page it sometimes goes to the previous page instead. I've been doing some tests, but unfortunately I don't know when this happens. Most of the times, but not always. The buttons always work ok.
It's not a critical issue, but if it could be corrected it would be nice
(if nobody else can replicate these issues tell me, maybe I have to reinstall the firmware).