If you decide to install this firmware, you really need to back up your memory entries as well as other data to the SD card before installing the new firmware, because the warning in the write up about the new firmware update stated that the memory architecture is changing (i.e. - they are stored differently) is really true!!
Also, there is a firmware update for the DV-10 and it has the same changes but there is no warning in the description of the firmware about doing the back up. The memory data is really corrupt after the update until you restore the memory information from the backup.
The owner's manual for both receivers mentions that you should backup your data.