Canon just announced new firmwares for both cameras.
Canon EOS 7D Firmware Update Version 1.2.3
- 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.
- Fixes a phenomenon in which the Macro Ring Lite (MR-14EX, MT24-EX) and slave flashes do not sync while shooting wirelessly.
Download Firmware Update Version 1.2.3
Canon EOS Rebel T2i / 550D Firmware Update Version 1.0.9
- Fixes a phenomenon in which tone jumps become noticeable in some images, depending on the shooting scene, when shooting with the Auto Lighting Optimizer settings (Low / Standard / Strong).