Taken from the original posts found using 'mouse lags'
@GA, Just report it as a bug and see what happens.
'SetGraphicsDriver GLMax2DDriver() Graphics 1024,768 While Not KeyHit(KEY_ESCAPE) DrawLine MouseX()-5,MouseY()-5,MouseX()+5,MouseY()+5 DrawLine MouseX()+5,MouseY()-5,MouseX()-5,MouseY()+5 'Flip 0 ' no lag Flip 1 ' mouse lags 'Flip -1 ' mouse lags Cls Wend
@GA, Just report it as a bug and see what happens.