"Firmware version 1.2.3 incorporates the following fixes.
1. Fixes a phenomenon in which the settings of the Speedlite Transmitter ST-E2 revert to the default settings when both the camera and the ST-E2 are set to auto power off.
2. Fixes a phenomenon in which the Macro Ring Lite (MR-14EX, MT-24EX) and slave flashes do not sync while shooting wirelessly."
Comments
According to the Canon site:
"Firmware version 1.2.3 incorporates the following fixes.
1. Fixes a phenomenon in which the settings of the Speedlite Transmitter ST-E2 revert to the default settings when both the camera and the ST-E2 are set to auto power off.
2. Fixes a phenomenon in which the Macro Ring Lite (MR-14EX, MT-24EX) and slave flashes do not sync while shooting wirelessly."
Moderator of the Cameras and Accessories forums
Gonna try tonight, stay tuned...