Mailplane 2.3.1 released

Release notes:

• NEW: Support for the Boomerang Gmail plugin: Boomerang for Gmail lets you take control of when you send and receive email messages. To install: Go to Preferences > Accounts > Plug-Ins and enable the plugin.
• NEW: Mac OS X 10.7 (Lion)
• DISABLED: TrueNew Plugin
• FIX: Attach files doesn't work on Mac OS X 10.5 (Leopard)
• FIX: Rapportive plugin was not able to login
• FIX: Possible fix for the external links didn't open in Firefox.
• FIX: Auto-BCC caused focus to jump to BCC field.
• FIX: Window sizes were not remembered.
• UPDATED: French, Swedish, Romanian, Japanese, German, and Spanish translations
• AUTO-UPDATED (new preferences are English): Catalan, Icelandic, Italian, Japanese, Norwegian, Polish, Portuguese (Portugal), Russian, Chinese (Traditional), Chinese (Simplified)

Note to App Store users: The update has been submitted yesterday, it'll soon be reviewed by Apple.