Embryo, maybe Marek's image is set up differently from Angor's. I'm not sure. Perhaps it's not so important, but little things like that bother me.
An a different note, I discovered that you can change the screensaver by saving a JPG file as "suspend.jpg" to the root directory.
Here is a website where you can find a ton of options:
http://ereaderbackgrounds.com/index.php
Again, make sure that the filename is "suspend.jpg" :-)