Ignore the other post. He was wrong. It was not an issue with AI. If you updated to 10.9.1 the issue should now be resolved. It also did not effect any other browser with 10.9 like Opera, Chrome, or Firefox. This was a problem with either Safari or 10.9 but the latest update to 10.9.1 resolved the issue.
1/25/14 at 11:59am