hi there. i have updated to mavericks and iTunes 11.1.2...and since then, in iTunes, the track list, or track timeline (the thing that enables you to scroll through the track), keeps randomly disappearing. i occasionally fast forward songs so i noticed right away... but when this randomly vanishes, there is no way to control the track that is playing, just skipping is the option. it is extremely annoying. anyone notice this too?? here are pictures of what i am talking about. here it is: ...and then randomly vanishes!