I asked upstream about this, and there are two issues here. The system tray bug was recently fixed in svn. It is a very simple problem, and I'm attaching a dpatch for it.
The deprecation warning and download location bug is apparently specific to Debian, but I'm not sure why. It's only a minor inconvenience though, as the setting is saved, but is reset if the preferences menu is opened again. http://forum.deluge-torrent.org/viewtopic.php?f=7&t=106 -- Cheers, Sven Arvidsson http://www.whiz.se PGP Key ID 760BDD22
enable_system_tray_pref.dpatch
Description: application/shellscript
signature.asc
Description: This is a digitally signed message part