i programmed an M3904 where an M2317 used to be. I outted and rebuilt it, put some hotlines on it, and customized the labels with the names of the people the hotlines pointed to. Well, a couple of days later the phone reverted to an M2317 again. and the date on the bottom of the TNB was not the date I changed it, but rather the date of the last change I did to the M2317 set! so i outted it again, and rebuilt it as an M3904 and the names on the hotlines showed up automatically! I didn't have to retype them in. Have you ever heard of this happening?