First post here. After I updated to Mavericks I have had these problems. 1. I start a video playing on YouTube but if the cursor moves on the video window, (say to click on the full screen icon) the video restarts. It only happens once each video. It happens on all browsers. I have a video link to it happening but not sure of the policy for posting links. 2. My Apple mail no longer downloads from my work and home gmail accounts. The only way it will download new mail is to restart mail or right click inbox and take all offline and then take all back online. I hoped the 10.9.1 update would fix this but it hasn't. Any help would be welcome.