We had this same issue (SCCP75.9-0-3S phones running CM 8.0.3.20000-2, with all personalization enabled.)Our trick was to change the CCMCIP Service (in Phone Designer) to the phone's Subscriber IP address (it was set to Publisher's) and that resolved...
We, too, were receiving the "personalization disabled" with Phone Designer on our SCCP75.9-0-3S phones running CM 8.0.3.20000-2, with all personalization enabled.It appears Phone Designer on CM 8.0+ won't work if the CCMCIP Service (in Phone Designer...