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What big things do SeaMonkey 2.16 builds offer (over SeaMonkey 2.15)? (All)


  • Reply to List is now supported (bug 654009, bug 814948)
  • Add-ons may now provide custom plugin preview overlays for specific MIME types (bug 812898)
  • SSL-related warning prompts (leaving or entering a secure site, viewing mixed content) have been replaced by less intrusive, non-modal notification bars (bug 810673)


  • The message signature was misplaced when the Compose window was invoked by a mailto: link with body parameter and signature position set to "above the quote" (bug 545859)
  • Memory leaks and database corruption could happen when saving the Received header to the message database (bug 810637)
  • The Account Manager IMAP account option "Synchronize the most recent" is now saved correctly (bug 804091)
  • Reply All no longer converts all "To" recipients to CC, i.e. preserves the original destination fields now (bug 250187)
  • Trying to delete address book entries now asks for confirmation (bug 768005)
  • Page Info properly detects animated images again (bug 811904)
  • The distinction between high/medium/low-grade encryption has been removed (bug 810671)
  • The arrow images and labels of the Previous/Next buttons on the Compose window Table Properties dialog now appear properly separated (bug 371195)
  • In the Filter Rules dialog, new filter conditions are now inserted rather than appended (bug 392848)
  • The Preferences UI for the obsolete OCSP responder functionality has been removed (bug 810672)
  • CAF (Core Audio Format) has been added to the types of sound files selectable on Mac OS X (bug 791266)
  • When the Sidebar is collapsed on startup, the context menu is no longer broken (bug 802166)
  • Detection of illegal host names in the Account Manager has been improved (bug 80855)
  • Build support for BeOS and VMS has been removed (bug 808399)
  • Using the Delete key in the Feed Subscriptions window now works as expected (bug 805446)
  • Primary identities are now shown in bold on the Compose window's From identity picker (bug 793135)
  • The placement of the Advanced button in the Account Manager, Server Settings now depends on the server type (bug 779990)
  • If the Compose window is the last one open, the message is now sent correctly even if mailnews.sendInBackground is true (bug 807666)
  • The View button on the Message Security dialog of the Compose window is now disabled when there is no certificate to show (bug 804955)
  • The folder picker of the Move To/Copy To filter actions in the Filter Rules dialog now uses the cascaded layout instead of the flat list (bug 315367)
  • The collapsed state of accounts in the Account Manager now persists (bug 536248)
  • MailNews accounts and servers are now sorted by type, putting RSS and news accounts last (bug 749200)
  • The smime-type=enveloped-data parameter is now added to newly created signed/encrypted S/MIME messages in order to fix interoperability issues with Eudora (bug 498443)
  • Support for the HTTP keep-alive preference has been removed (bug 804657)
  • Feed previews now work even with JavaScript disabled (bug 804411)
  • On Mac OS X, tearing has been disabled and SeaMonkey now shows up under Productivity when sorting applications by Application Category in Finder (bug 803781)
  • The selected Outgoing Server (SMTP) is now scrolled into view so that the selection displays correctly (bug 736661)
  • Sanitizing of the "No Proxy for" list in Preferences has been improved (bug 783600)
  • Saved searches now work for searches on custom x-headers (bug 363238)
  • The default client check is now only done on startup instead of each time a new browser window is opened (bug 803585)
  • The filter context UI ("Apply filter when") in the Filter Rules dialog has been changed to use checkboxes (bug 775665)
  • The filter editor dialog layout has been improved slightly (bug 777287)
  • The Silverlight plugin is now run out-of-process in 32-bit mode on Mac OS X (bug 801272)
  • Subscribing to a newsgroup multiple times duplicated it (bug 795562)
  • The decimal separator used in message/file size display is now locale-dependent (bug 668756)