Warlords - using arrow keys + Enter in main menu

[crunch]

In the main menu of Warlords, it is possible to navigate via arrow keys and Enter key (and Escape).

BUG: When I press Enter on either "Civilopedia" or "View Hall of Fame", the desired screen is displayed for a split second and I'm back in the main menu.

NOTE: It works correctly for e.g. single player, scenarios, etc.