My wife purchased the IKEA PS 2014 light fixture for my son's room. (For the record, I hate it too.)
However, the Casetta switch in this room stopped working -- it worked for about 30 seconds (not sure exactly how long). And then the green lights on the switch went out. None of the buttons would do anything. Light fixture remained on. (Using the same bulb that was in the previous fixture.)
Reinstalled the switch in my daughter's room and the switch works perfectly.
So I think it has to be some incompatibility between the switch and the fixture -- Only thing unusual about it is that it says it has an "automatic shut off feature" if a bulb of more than 13W is but in the fixture. Is there anything I can do to get them to work together?