When autosaving an e-mail in draft (I have a greek version,so I hope it's called "draft") you've only got options for 3, 5 and 7 minutes. Why not adding an option for 1min?
You should also check for a bug where I can't choose any of the above, and the option is always set at "never" (I can't click on the drop-down menu!)
Current SVN trunk release options are: [never, 1, 3, 5, 10 mins].
/trunk ? RoundCube Webmail (http://trac.roundcube.net/browser/trunk)