Fixed a crash that could occur when removing duplicates or sending messages.
Fixed a bug where messages sent using e3 Delivery Service would not correctly merge mail-merge tags relating to subscription group data (URLs, owner information, etc.).
Messages imported from web pages now have better CSS inlining.
Users are now prevented from accidentally shrinking message, address, and history view source lists to a zero width.
Message preview window no longer hides itself when the application is sent to the background.