1DMKII losing images

[samd12]

I am at a loss on what to do here. I have a 1DMKII that was losing images about a year ago, I sent it in for service and had to pay $185 to have the camera repaired as it was out of warranty. It took me a while to confirm the problem because it would only lose a few pictures here and there. They replaced a board and all seemed well. Well now it is happening again. Tonight I was shooting and bringing the card back to the computer every few minutes and sure enough the last few frames I took were gone. I am on the latest firmware, I know of the earlier bug they had, and I am using Sandisk Ultra II cards (4GB) not Lexar.
So now here I am saying to myself do I pay another $185 and have a camera that I can not trust. I have always been suspicous of the camera since the first issue and recently thought it was happening again so I did some controlled testing. I just do not know if I can ever have confidence in this unit again and now I feel stuck. There is no way I would ever sell the thing to anyone knowing it could be a dud. Other than that the camera has been great. So what would you do? As crazy as it sounds I am not a professional but have a very substantial amount of money invested in Canon gear. Ideas? Comments??

[Mark_Cohran]

If you've sent it in for repair once and Canon replaced a part, and now the same problem has recurred, I think you have a good case for getting Canon to repair it free of charge. It certainly wouldn't hurt to approach them about the issue.

Mark

[fredmitcham]

have you tried a different card?

[samd12]

I was told once before they warranty repairs for 6 months, we will see though as I will give it a try.
As for a different card this time I did not try another one, I was so agitated when I realized it was happening again I had to walk away. It is a very random thing and I can not find any pattern that causes it so it’s not like I can just make it happen. I guess I will give it a try but again it is very sporadic

[Jon]

Are you sure the camera'd finished writing to the card before you removed it? If you're shuttling the card back and forth between camera and computer this is a very real risk. If you really need to have the pictures available on the computer right away, maybe you should try using Remote Capture.

[samd12]

Yes the camera was finished writing, that I am sure of. Even with the weather here in NJ today I dropped the camera off at Canon service with the CF card. They say it will be $192 to have them look at it and that covers basic repairs.
When I was speaking with the person behind the desk he mentioned that not only does the camera have a firmware (it is on the latest version) but the CF card firmware may need to be upgraded.
Has anyone ever heard of that?? I have never upgraded the firmware on a CF card. It is a Sandisk Ultra II 4gb

[Jon]

Lexar cards hads a firmware problem a couple of years ago. Canon posted service notices on this, and they're probably still up.

[samd12]

I saw that info on the web. when I dropped off the camera I left the SanDisk Ultra II 4gb card there with it.
I can not find anything at all about Sandisk CF cards and firmware upgrades