I have a 2811 CCME. I've just done a reboot of it (after doing a wr) and its come back up fine.
However - all of the handsets have lost their custom rings.
When I try to browse the rings the handsets say they cannot find the ring list.
I've checked flash and RingList.xml is there, along with all of the ring files.
I've also checked that the tftp-server command is there for all relvant files inclusing RingList.xml and it is.