Problem with MK3 new 1.2.3 firmware

[echelonphoto]

I installed the new firmware the other day because I was having problems where the 600 rt on camera flash would misfire on occasion even though it was fully recycled. I just shot a job last night and to my dismay....the camera did about 4 or 5 full manual dumps throughout the night even though I was using ettl....this could really cause the loss of important shots...anyone else experienced this?

 

[drjlo]

Are you sure it's due to the new firware? Something similar to what you describe have happened to me in past, but with 5D III and 1.2.1 firmware, using 90EX as optical ETTL trigger with off-camera 580EX II..

 

[wickidwombat]

Are you sure it's due to the new firware? Something similar to what you describe have happened to me in past, but with 5D III and 1.2.1 firmware, using 90EX as optical ETTL trigger with off-camera 580EX II..

580s have been notorious for doing this before but I have not heard of it happening on 600RTs before