Taking my first walk with the camera and the new update 4.30, i encounterd a freezing shutter.The Metering on spot and the drive on single frame the shutter freezed. Say 7 out of ten. By setting the camera off and on the problem still exits. Removing the battery would sometimes help. I had the XT wit the batterygip on and funny enough after removing the grip during the last shots, the problem didn't happend again. Anyone else having the same experience?