Canon today posted firmware 2.0.0 for the EOS 10D. This firmware update primarily adds PictBridge support but it also makes three improvements / fixes: 1. Improves release lag when using Microdrive's, 2. Corrects AE Lock operation when using custom function 4 settings, 3. Fixes Exposure compensation display errors when using the ST-E2 Speedlite Transmitter. Update is very easy, simply drop the firmware update file onto a Compact Flash card, insert it into the camera, power on and select 'OK'.

Click here for the Canon EOS 10D Firmware update page