I'm running 10.9.2 on the newest model Air. Now and then I see graphical glitches like a line across the screen, it goes away after a moment.
Ongoing OS X bugs I'm seeing:
1. Graphical glitch. Probably Air/firmware related.
2. Finder app+desktop freezes sometimes when I try to name a desktop file, usually a video file. Finder cannot be force quit in this scenario and the only way I know how to get around this is to restart my Mac via the restart keyboard...