I got this to work on my DVDR985 by removing the text file, burning "disk at once," using filesystem 2/XA, ISO9660. Took about 15 mins and applied it fine; I ran it again and got the "up to date" message.
Now I put in a DVD+R, fresh off the spindle, it records for about four seconds, then I get the message "DB 7FC58422". The message fades and then the recorder powers off.
I thought it might be a bad disc but I wanted to check here before making a bunch of coasters looking for a "good" disc. The error message just sounded like it might be related to the firmware upgrade. Has anyone seen this?