I've found a little easteregg in the standart bf2 menu.
Its very simple:
go to options
game options
and then click in the lower right corner of the left hand column (right next to the Reset to defaults button.
Wham, and your menu is screwed up
Its based upon the crosshair color and alpha:
the three RGB sliders control the color of the background, and crosshair transparency slider does the alpha.
Very funny, not?
simple restarting the menu resets it to its defaults (which are R:70 G:70 B:70 A:30).