0.7.1 (29 September 2006)

• Log all JavaScript errors to logfile.
• Do full redraw if cached version of thread does not include currently displayed message.

0.7 (14 June 2006)

• Delay redraw of visualisation by 0.5 seconds after zooming to prevent unnecessary redraws.
• Better redraw of visualisation by reusing existing elements.
• Bugfix: preferences dialog in Thunderbird 1.5 ignored some changed settings.
• Added timeline to display time between two messages (in addition to time scaling).
• Added preference to set default zoom level.
• Bugfix: stop panning at visualisation boundaries.
• Added scrollbars to visualisation.
• Bugfix: better handling of unknown messages
• Changed algorithm to determine arc height, visualisation gets more compact.
• Bugfix: checkboxes for enabled accounts and folders were not created correctly, in nested folder structures some folders were missing. (Thanks, Patrick!)
• Use "pointer" cursor style (pointing hand) if hovering over message to indicate the possibility to click on the message.
• Bugfix: prevent panning of visualisation by clicking on message.
• Use "grab" cursor style over visualisation to indicate the possibility to do panning.
• Use "grabbing" cursor style while panning.
• Don't compress chrome .jar file to speed up application load time.
• Added popup-window to display visualisation in a separate window.

0.6.1 (29 November 2005)

• Bugfix: The rightmost message was cropped under some circumstances.
• Bugfix: Resize visualisation if box is resized (e.g. window size is changed).
• Bugfix: Underline authors also in expanded CC and BCC header fields.

0.6 (15 November 2005)

• Extension now works with Thunderbird 1.5
• Completely redesigned preferences dialog for Thunderbird 1.5
• Small bugfix in handling the children of a message.
• I think this should take care of the annoying "too much recursion" error that sometimes crashed the extension.
• Added delete/cut/paste operations.
• It's now possible to manually link messages together or separate threads that should not be linked together.

0.5 (5 October 2005)

• It's now possible to zoom and pan the visualisation
• Added a bigger area around the messages to catch clicks (easier to click on messages, particulary when they're small)
• Better handling of messages that have not yet been analyzed.
• If you read a message that has not yet been analyzed by the extension (e.g. you subscribed to a new newsgroup), the extension now re-evaluates the new messages.
• Started to make the extension compatible with Thunderbird 1.5

0.4 (19 August 2005)

• Added preference to disable (exclude) accounts in the extension
• Added preference to disable (exclude) (sub)folders of an account

0.3 (24 June 2005)

• New visualisation code:
  Do not use images, but draw using XUL and CSS
• Use colours for different authors
• Underline authors in header view with colours
• Removed loading image
• Visualise selected message by drawing black circle
  (if colours are used)
• Added popup menu to change settings
• Moved preferences to global preferences dialog
• New preferences layout
• Removed entry in Tools menu
• Fixed behaviour for two messages with same MsgId
  (aliases, mailing-lists)
  only display once, as sent
• Enable/disable logfile right after changing preference, no restart necessary
• Better detection of sent mails, also check from-email
• Handle new messages and moved messages properly
• New preference to enable/disable extension
  (needed because Mozilla can't disable an extension itself)
• Could not write logfile after reset
• Fixed display of extension when opening new window
• Better handling of malformed references:
  remove whitespace, better splitting (newline, tab, ...)
• Better detect account switching
• Better avoid blocking UI

0.2.2 (10 May 2005)

• Added even more debug information. There is a bug somewhere and I've got to find it (thanks Bernhard!)
• Improved logging speed.

0.2.1 (10 May 2005)

• Small bugfix in logging of statistical information.
• Added more information to debug logging.

0.2 (9 May 2005)

• Localisation code added. Now ships with locales en-US and de-DE.
• Added default preferences for all settings.
• It's now possible to choose between three sizes for the visualisation.
• New Feature (optional): Time Scaling.
• Messages are not laid out evenly, but the spacing reflects the time difference between the messages.
• Added debug logging option to help finding bugs.
• Reworked options dialog.
• Now contains options for logfile and debug log, Time Scaling, size of visualisation and about dialog (it was not possible to get the version number in Mozilla).
• Fixed bug in creating directory structure for logfiles under Linux (thanks Bernhard!).