Screen saver password box don't show?

[antdude]

Why are my OpenGL screen savers (i.e. Voodoo Lights) not showing the password prompt? I can see it for 1 millisecond when I want to enter my password. I can enter the password blinded, but there is no box.

Normal screen savers that don't require OpenGL work fine. Anyone know what's up? Thank you in advance for replies.