It's been way too long since the last stable release.
Compared to the last stable, 1.1, this release has a huge amount of improvements and fixes. The changelog since 1.1 is almost 300 lines long (1200+ commits). Code quality has improved, in parts thanks to Coverity Scan. We now switched to GitHub completely and have a few buildbots (including one for Windows) to test...
Aircrack-NG 1.2
The best pentesting suite ever used. Great for WPA and WEP cracking