Apple has released iTunes 7.3.2, saying only that the update "provides bug fixes to improve stability and performance," although iPhone Atlas [1] is speculating that there are iPhone-related changes based on which files have been modified. The update is available via Software Update as a 34 MB download or from Apple's iTunes download page [2]. MacFixIt [3] is reporting the usual spate of odd behaviors that follow any update, likely related to some form of local file corruption, so it's worth making sure you have a backup of your iTunes Library before updating.
[1]: http://www.iphoneatlas.com/2007/08/02/itunes-732-appears-to-include-iphone-related-bug-fixes/
[2]: http://www.apple.com/itunes/download/
[3]: http://www.macfixit.com/