I've noticed from looking at different theme available for the M600i, and from instructions on the SE website, that my M600i seems to have a slightly different interface.
In this image here: http://gallery.mobile9.com/f/52619/
there are buttons along the bottom and the background picture can be seen clearly. However, the following picture: 
is a capture from my phone. No buttons along the button and a menu screen that cannot be removed.
Am I missing something or is my phone strangly different? Does anyone else have the same view?
Edit* When I say buttons along the bottom I mean buttons with icons. Just noticed as well that my clock is in a different place!