so it is. Although, I turned it to auto-hide to do these tests otherwise I couldn't see the bottom of the window. Thing is most end-users will have it set "Keep on top" too as it's the default setting isn't it?
[edit] just tested with Keep on top turned off. Same result. The task bar does not affect the window sizing.
[edit] just tested with Keep on top turned off. Same result. The task bar does not affect the window sizing.