Canon have released a new firmware update (version 1.2.4) for the EOS-1D Mark II DSLR.

This firmware update (version 1.2.4) includes the following additional functons and improvements:

1. 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 when a CF card is replaced while the power of the camera is switched on.

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

Website: Firmware Update Version 1.2.4