Ivo wrote:
You can turn off the setting "Show on all taskbars" in the Start Button tab. If only the main taskbar has a start button, the menu will show only there.
If that were true I'd be happy, because that's what I want. But I can confirm the behavior GauravK describes: The Start menu always shows on the monitor where my mouse pointer is, even when opened by pressing the windows key. The buttons are not visible but there still is a clickable space that opens the start menu (for me that's not a problem).
I did reset all settings to defaults, changed just the settings "Replace Start button" and "Show on all taskbars", but still no cigar.