Jochen-
If I misunderstand your problem, I'm very sorry. Feel free to email our OmniFocus
support people in your native tongue and we'll get this sorted out.
If I understood your report correctly, we need to change the code that draws the pop-up menu. Currently, it will let the menu extend past the edge of the screen; you need to move the window to actually see the full list of suggestions. Sorry for the inconvenience this causes!