This release should make FD3 really usable for your daily work and also it is starting to feel pretty solid.
Major changes:
Added first additional theme
Experimental completion support for SWC libraries added
Parsers & completion have been fine-tuned and things are more customizable
MXML completion is back and you can freely add completion for any other
XML-based languages
Many UI & compiler issues have been solved
Recent projects list is back in the toolbar
Read more: http://www.flashdevelop.org/community/viewtopic.php?t=1592