CPS R06.11.05 or newer (available from Motorola) should fix it.
I am happy to report that the R06.11.10 cps fixed my EEPROM CKsum problem although
it took some tinkering around to get it to work right as there is no help in the help file on how
to use it.
If you have an archived codeplug file open it up and try and write it to the radio.
You will get a cps warning that the radio data is corrupted and it asks if you want
to correct the problem with a default or a archived codeplug. I selected the default
even though I should have selected the archived. The cps immediately wrote the
default codeplug data to the radio and the radio recovered partially.
Then I reopened the archived codeplug and tried writing that to the radio. At first it
did not take but I kept trying and it eventually successfully wrote the archived data
to the radio and I confirmed the radio was fully functional after checking it on a service
monitor.
Excellent - less shipments to moto for these kinds of errors.