Plugin 'update' warning icon made into yellow/red flashing icon
Added icons for outdated, blocked or warned plugins
checked buttons (toolbar, addons, pageinfo, options) more 'depressed' look
Force 'preferences/options' panel selector icon to fixed size (for extensions with strange icon sizes).
text-shadow for disabled items, and warning text in findbar.
Give more tabs the corr. folder/server icon.
Added borders for 'content' tabs
Normal font, textcolor, background, and buttons for 'Migration Assistent' page
Bug 513841 - improve the look of tags in the message header and search results
Lightning: Bug 367359 - Attendees Dialog: Zoom buttons don't work
Bug 516884 - High-level UI to control major feature changes between TB2 and TB3
Improved layout of invite dialog for Lightning 1.0
Fixed reply-list button and download button.
Use appversion specific configuration to disable rounding in TB2 (where it is really ugly).
Bug 518558 - [autoconfig] Autoconfig is available ONLY in first startup
Bug 509044 - text beside icons in default mail toolbar
Fixed layout of the 'Repeating Event - Custom Repeat' dialog box.
Fixed layout of the daypicker (weekly/montly).
Bug 480470 - Customize toolbar should have button for "Archive"
Bug 35689 - Newsgroup postings don't linkify newsgroup header (like 4.x)
Bug 499543 - Message header and attachment box can display on top of the statusbar
Bug 351321 - italic and bold font for high and low priority
Bug 499989 - mail header view: more button has problems and should be improved in some way
Bug 501910 - Consider Preferences UI for cookies
Bug 461744 - Missing icon on minimonth dropdown button in miniday in today pane
Improved layout for inline attachment separator in messageBody.
Improved layout multimessageview.
Fixed tag display (in threadpane, messageheader & multimessageview).
Fixed layout for applications pane in Options dialog.
fixed tree styles for 'seltype=cell/text'