Implement Ancardia servers "autosave every 1000 turns" feature
Currently testing crash-prone prereleases like p20 or r48 is really annoying - you cant really know what will crash your game, and you need to manually save and exit for backups quite frequently.
Ancardia servers solve this problem by implementing auto-save feature - every 1000 turns game saves into the backup folder. 1000 turns between autosaves should be configurable variable, perhaps between 100 and 5000. Also every time when you press "S" - backup is created too with message - "Backup .svg created! Do you really want to save? [y/N]", making backups as easy as one click. Game searches for backups presented without saves on startup - assuming that if you forced to close ADOM, there wont be savegame, but there will be backup - and you are asked if you want to restore it automatically.
This autosaves makes testing of prereleases on server a lot more convenient that on local PC, and implementing same feature into main ADOM would speed up testing process quite a bit. If there is R49 already "around the corner" - there will be a lot of early game fixes, but noone would complete whole game because of crashes and old backups/no backups making him not want to play this character more. If there will be late-game bugs - R50 would be "around the corner" again, and such frequent releases are not exactly good in my opinion.