Not really sure where this should go, so I'm putting it here

In fact, it's not even much of a question, just wondering if anyone else was having the same issues.
Whenever I try and emulate a Netbook resolution (say 1024 x 600) in windowed mode; instead of appearing as expected, It's as though it's using a resolution of 1024 x 768, just with the bottom 168 pixels missed off. (As I type this I realise I have only ever set the window size through the Editor)
I was hoping to use this method to test my software for Netbook compatability (What with me not
actually having a netbook), but this isn't ideal atm as all the 3D stuff is positioned wrongly on screen (vertical centering is way off) on all 3 PC's I have tested this on so far.
Has any one else noticed this? or am I going wrong somewhere?