Check Software Update, because Apple has released iTunes 11.0.3. This update offers a few new features, including a new MiniPlayer that highlights album artwork and has a built-in progress bar. That should make many people happy.
Also, iTunes 11.0.3 has improved the songs view and has support for multi-disc albums, in that they now appear as a single album, which is great.
You can download it now and check out the changes right away. Have fun.