Canon has today posted firmware updates for the EOS-1DS Mark II and the EOS-1D Mark II. Both updates fix problems with file numbering that occurred when shooting bulb exposures and also improves communication when using some CompactFlash cards. Version 1.1.4 for the EOS-1Ds Mark II also addresses a problem of horizontal line noise appearing when P.Fn-21 is set to ON.
Click here to download the Canon EOS-1Ds Mark II firmware update version 1.1.4 (PC / Mac)
Click here to download the Canon EOS-1D Mark II firmware update version 1.2.4 (PC and Mac)