Well, for the first time my X100 has completely locked up. It's the latest firmware (1.13), and only about 1000 shutter actuations (so surely cant be SAB). Was shooting in AF-C, pressed AEL/AFL button, took a shot. Waited for the OVF hybrid screen to come back again after the preview, took another, then another and then; LOCK UP. Switched it off but still had the OVf hybrid screen showing. Replaced the battery which helped, but again after a few more shots it happened again. anyone else experienced this? It's off back to Fuji now, but would be interested in others experience of this. I understand from previous thread son other forums/forae/fora, the latest firmware upgrade solved this. for what its worth, i use an extreme pro SD card, so it aint the write speed surely.