Canon has released firmware updates for the T2i and 7D DSLR cameras. While they aren’t major updates, they do fix a few bugs.
Firmware fixes for Canon 7D:
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.
Firmware fixes for Canon T2i:
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).