Hi,
I'm experiencing the same problem when trying to log and transfer footage from my 600D (ml 2.3) to final cut 7, the message appearing is the same.
I'm going to try tonight to erase all the log files (I've put somewhere safe a disk image of the card so I won't lose anything) from the dcim folder,. I think that these log files are at the origin of the problem.
Let's see