"When you have antialiazing set to override program settings... the menu won't appear with the space bar... that's always been an issue If I recall."
Taken from post
https://www.feldoncentral.com/forums...ead.php?t=4657 witten by Mith.
If you have Windows Vista, and an Nvidia video card, with the latest Nvidia drivers:
1. Right click the desktop, and then select Nvidia Control Panel.
2. Under Select a Task, expand 3D Settings, and then select Manage 3D settings.
3. On the right hand pane, select the Global Settings tab.
4. In the Settings, select Antialiasing - Mode and chnage the option to Application-controlled. (Or you can click the Restore button to restore all default settings.)