Available now via Canon Japan's website, EOS 7D firmware 1.2.3 fixes a couple of bugs related to operation with a Speedlite Transmitter and Macro Ring Lite. Rebel T2i firmware 1.0.9 addresses an image quality issue caused by Auto Lighting Optimizer in certain situations.
Click the links below for more info, downloads and instructions:
Canon EOS 50D firmware v1.2.3
Canon EOS Rebel T2i / 550D firmware v1.0.9