Apple has released an update to iTunes that addresses a number of bugs with the program's handling of photos, videos, and music artwork, along with a couple of file ordering issues and VoiceOver corrections.
The update should also fix a problem in which iTunes may become unresponsive for people using iPod Nano or Shuffle devices. So if you have one of these and have experienced hangs with iTunes, then this update should help.
A final fix in this update is for a problem in which browsing through TV episodes on an AppleTV device might result in them being reorganized.
The update should be available for both OS X and Windows via Software Update for those who have iTunes installed, but can also be downloaded at the iTunes Web site or CNET's Download.com. The download is about 126MB for people running OS X, and will be around 70MB for those running Windows.
As always, be sure to back up your system, and especially your iTunes library, before applying this update. If you use Apple's Time Machine for backing up your system, then you should be good to go, but if not then you might consider at least copying your iTunes Music folder to an external drive as a means of backing up.