Antialiasing in fullscreen questions

Hi, I have a few questions about antialiasing in OF.

I guess that this string in main.cpp

window.setGlutDisplayString("rgba double samples>=4 depth");  

Sets the glut window to be enabled for antialiasing. I am running my app fullscreen and OF_GAME_MODE seems to be the fastest from my tests, I have a rather complex scene but It all runs smooth in game mode with the above string commented out thus not giving me any antialiasing on polygon edges. I can however get smoothing on lines in this mode using GL_LINE_SMOOTH method. So the only real problem I have is a few polygon edges not appearing smooth.

So my question is, is there another way to make polygon edge smoothing that is faster? Or is there something I am missing in my implementation.

All help would be greatly appreciated!