I just noticed a glitch in Lion. Not a big deal, but its a bit annoying. I've got my background set to change every 5 minutes. I stepped away from my MBA for about 20-30 minutes, and when I came back, the screen was off and I had to type in my password (all normal). But then, the task bar at the top of the screen (which is semi translucent) had a different background image than the actual desktop's background. I tried a few things to get it to refresh, with no luck. Eventually I restarted the whole system, and then it went back to normal. Strange and annoying, but not a huge issue. Edit: I've also had one crash already (within an hour of installing Lion). I dunno if it was because the system was indexing, or what, but everything froze midway through the software update (I think it was dl'ing the new iTunes). No apps would open. I had safari open, and nothing would load, but the trackpad was responsive. I had to force power down (holding down the power button), which is something I don't think I ever needed to do with SL. Hopefully it doesn't happen again.