Be careful with old versions!
These versions are displayed for reference and testing purposes. You should always use the latest version of an add-on.
Recieved attachment list background color (readability issue).
New mail popup text and background colors (readability).
* New Tasks toolbox background and icons (Vista/Win7 specific).
* New Events toolbox background and icons (Vista/Win7 specific).
* Events/Tasks panel & sidebar highlights.
* Invite Attendees - date/time heading and time pickers.
Address text color (To:) corrected.
Additional extension support.
Text color inheritance for better extension support.
Minor fixes with layout and textures.
Thread list readability.
Add-on Collector: width problem fixed.
Table2Clipboard: Settings link color readability.
Stylish: button text color fixed.
Welcome text color fixed.
Option -> Basic tab: Feed/Group readability.
Update Notifier: Tray popup readability.
Lightning: label colour corrections.
Support for a number of other extensions.
Highlights: redone as requested.
Toolbar icons: difference between enabled and disabled made obvious.