I'm entirely not sure that it's a CMC related issue. It seems that your DRAC memory might have gotten corrupted.
I found the error message you encountered in the following M1000e documentation: http://support.dell.com/support/edocs/systems/pem/en/hom/html/about.htm
System service update required - The iDRAC6 Enterprise Card flash memory may be corrupted.
Recommended action: Restore the flash memory using the latest version on ftp.dell.com or support.dell.com. See the iDRAC6 User's Guide for instructions on performing a field replacement of the flash memory.
It seems that you took the correct action - If you get that error message again you probably want to contact Dell support.