On some occasions - especially at the 18mm end - it seems like the OIS blurs my images. I can get like 3 in a row that are slightly blurred and then when I switch off the OIS the next images I shoot (same motives from same position) look just fine. Pin sharp. The pictures are taken in bright dayligt with high shutter speed and the motive is people 2-3 meters away from me. I have never seen the issue on the tele end and sometimes OIS seems to work just at the 18mm end as well. OIS is set on my x-pro 1 to continuous.
This makes me wonder if I would be better off swithing OIS off during the day and only use it when the shutter speed gets to slow, as it seems to be a little to active for my liking.