Canon have released a new firmware update (version 1.1.4) for the EOS-1Ds Mark II DSLR.

This firmware update (version 1.1.4) includes the following improvements:

1. Fixes the phenomenon of horizontal line noise appearing when P.Fn-21 is set to ON.
Fixes the phenomenon of horizontal line noise appearing occasionally in shots taken with P.Fn-21 set to ON at high ISO setting, depending on the shutter release timing.

2. Fixes the phenomenon of file number errors that occurred when shooting bulb exposures.
Fixes the phenomenon of file numbers not being sequential even if the file number setting is for sequential numbers if a CF card is replaced while the power of the camera is switched on.

3. Improves reliability in communication when using some CF cards.

Note for users of the Wireless File Transmitter WFT-E1/E1A:
The camers’s WFT-E1/E1A settings will be initialized after the firmware is updated. Please re-set them after the update.

Website: Firmware Update Version 1.1.4