Recording / Playback

• Several bugs fixed so that latency correction should be better, and more devices work correctly.
• Problems with invalid sample rates under Linux should be much rarer.
• Newer version of Portaudio library.
• New feature to record onto the end of an existing track (hold Shift while clicking Record).

Import / Export

• Updated versions of Libogg, Libvorbis, Libflac, Libsndfile and Twolame libraries.
• Handling of unsupported file formats more informative.
• Handling of file names with slashes on OS X improved.
• New dialog allows replacement of illegal file name characters on all platforms.

Interface

• Improved scaling and layout for rulers and VU meters.
• Envelope fixes/improvements including full control of undo/redo.
• New keyboard shortcuts and improved menu navigation.
• Preferences:
• More intuitive tab arrangement.
• New options for mute/solo and Metadata Editor behavior.
• Language can now be changed without restart.
• Expanded Build Information tab.

Effects

• New Vocal Remover plug-in, improvements for Generate effects.

Compilation

• Fixes when building Audacity with libraries disabled.
• Improvements to make Mac and Solaris builds easier.

Security

• Full fix for issue CVE-2007-6061 on systems where temporary directories can be changed by other users (thanks to Michael Schwendt).

Miscellaneous

• Updated translations for many locales.
• Several stability improvements.