++ All modules
Convert remaining conf.php.dist files to conf.xml files (DONE).
Fix or better cleanup redirection/frameset loading code (95% done, frameset loading after maintenance doesn't work yet).
Remove use of Prefs::getPref().
Find a better way of accessing user profiles (Identities) (DONE).
Be able to access Horde preferences from within an application's options menu (maybe use Horde_UI_Tabs?)
++ Horde
Fix preferences with a "none" preference backend (DONE).
Package remaining Horde libs (DONE).
++ IMP
HTML composition (has this been fixed with the recent patch?).
Folder changes updating correctly in cache (DONE).