Mostly CRT screens as well as VGA connected screens may not be detected properly and the resolution is wrongly chosen (this is not a problem of OpenBSD or BSDanywhere, but of X).
Start an xterm and execute 'xrandr'. It shows you which output is currently connected. If it shows something like "VGA connected ..." you can execute 'xrandr --output VGA --auto". This should fix it.
In order to help ICEwm's background image to adjust, execute 'icewmgb &'.
