iTunes 8.2.1 available

Update 8.2.1 for iTunes is available via software updates:

iTunes 8.2 now supports iPhone or iPod touch with the iPhone 3.0 Software Update. iTunes 8.2 also includes many accessibility improvements and bug fixes. 
iTunes 8.2.1 provides a number of important bug fixes and addresses an issue with verification of Apple devices.

Clearly, this update is important even though the explanations, as usual, are brief.  It is 79.3 MB in size.