It's a good idea to actually read the stuff that comes with software... :-)
If you ask such a question it would be helpful if you mentioned the release too.
Anyway, sorry, had a bad day. This might help you:
The following is mentioned in the CUCM 6.0 Device Pack Readme:
NOTE: Apply this patch to *all* of your Cisco Unified CallManager servers, beginning with the publisher server and TFTP server.
The readme's are at the same place as the device packs (software download center).
If you have separate tftp and publisher, I assume you have a big installation base. Do this upgrade only during off-peak hours in a maintenance window. It can take quite a while to tftp the firmware to all the phones.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...