I have Micronik keyboard adapter for A1200 (A1200 -> PC keyboard). This one which is connected with flat cable directly to the A1200 mobo.
Keyboard is working most of the time. Problems may arise when I do a softboot. If all three lights in keyboard will be on after the softboot (caps, num and scroll lock) the keyboard will not work and do not response at all. In this case only the hardboot will help.
This won't happen after every softboot and it seem to be quite random (maybe once in every 5 softboots or so).