Hmmm, haven't heard of this either. I don't remember seeing any known bugs.
I guess I would start by looking at the network between the IP Phone and the CallManager they are registered to. Might be loosing packets due to WAN speed (assuming there is a WAN involved) or other factors such as switch port errors.
Not the case. I was dialing without being off hook and after completing the number I picked up the receiver and the number got sent to CCM. I strongly believe that if you are not off hook the digits don't get sent to CCM.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.