Can't set max resolution in windowed

have a 1920x1200 monitor, when I try set resolution in windowed mode either using SetResolution() or Resolution Dialog the resolution is only set to 1920x1139 leaving 61 pixel at bottom of monitor where I can see desktop.

I really can’t think of a solution, any ideas?

Originally I thought I caused it because I was playing around with windowed fullscreen (i.e. borderless) but I scrapped it all and the issue is still occurring.

-edit-

got a friend to test, the same app doesn’t cause the issue. Yet it doesn’t matter what app I compile I get the problem (including that new robot demo thingy). Not really sure what I’ve done.

Are those missing 61 pixels meant to be for the title bar? I don’t know why the bottom of the desktop is showing through. Oh, unless it’s got something to do with the aspect ratio you’ve chosen for the game?