roGridScreen - Gap above grid items

When using SetGridStyle with anything other than flat-movie or flat-portrait a large gap is left at the top of the screen before the first row. It looks like an empty row. This seems like a bug... am I missing something? To verify it wasn't something specific to my application I took the basic simplegrid example and only modified the gridstyle variable in SimpleGrid.brs Main():

'************************************************************
'** Application startup
'************************************************************
Sub Main()

    'initialize theme attributes like titles, logos and overhang color
    initTheme()
  
    'gridstyle = "Flat-Movie"
    gridstyle = "flat-landscape"

    'set to go, time to get started
    while gridstyle <> ""
        print "starting grid style= ";gridstyle
        screen=preShowGridScreen(gridstyle)
        gridstyle = showGridScreen(screen, gridstyle)
    end while

End Sub