Without further ado, let's start:
+Version 0.13.0 (TBR)
+====================
+
+NOTE: Database schema and settings format change, no downgrade possible!
+
+* Use Qt 5 by default
+* Add Breeze/Breeze Dark icon themes, allow selection of icon theme
+* Use Breeze icon theme by default
+* Make IRC rate limits configurable
+* Snapcraft packaging support
+* Sender colors by default (and optionally for ACTION messages)
+* Optionally hide brackets around sender/timestamp
+* Improved SSL certificate handling
+* Automated OSX builds (via Travis)
+* Improved automated Windows builds (via Appveyor)
+* Chat list filter/search
+* WebEngine support for URL previews (deprecates WebKit support with Qt 5)
+* QtMultimedia notification backend (deprecates Phonon support with Qt 5)
+* Various UI improvements (tooltips, tool bars, menus...)
+* Spell checking via Sonnet if KDE Frameworks integration is enabled
+* Support for many IRCv3 features, improved capability negotiation
+* Many smaller fixes and improvements
+
+Version 0.12.5 (TBR)
+====================
+
+* Better HIDPI support with recent Qt 5 versions
+* Inxi version bump
+* Prioritization of PING/PONG messages to prevent timeouts
+* Improved touch screen support (scrolling etc.)
+* Support Qt 5.6 and 5.7
+
+Version 0.12.4 (2016-04-24)
+===========================
+
+* Handle STATUSMSG messages (recently abused for query spam)
+* Link previews are enabled again in Windows builds
+* Fix core crash caused by clients sending invalid handshake data
+* Fix session management with Qt 5
+* Fix connection issues with non-compliant ircds
+* Translation updates
+
Version 0.12.3 (2016-02-09)
===========================
* Core connection improvements
* Build system improvements
* PostgreSQL connection improvements
-* Improve Qt5 support
+* Improve Qt 5 support
* Qt 4.8+ or Qt 5.2+ now required
* Several tweaks and fixes
* Translation updates
* Bump Qt dependency: we need Qt 4.6 for client and monolithic now
* Fullscreen mode (F11)
* CTCP CLIENTINFO support
-* Shortcuts for navigation between chats (Alt+Left/Right/Up/Down)
+* Shortcuts for navigation between chats (Alt+Left/Right/Up/Down)
* Add blowfish encryption (/setkey and /delkey; needs QCA2)
* Shortcut editing for all platforms (!KDE)
* Improved handling of invites
- KDE icon and color theme support
- Editable shortcuts
* Core now supports a proxy for connections to IRC
-* Core supports SSL certs and keys for IRC connections
+* Core supports SSL certs and keys for IRC connections
* Chat Monitor configuration dialog
* Audio notifications
* Clickable channel names in ChatView